Publications of J.A. Cuesta

Working papers

  1. REMONDO, J., SANCHEZ-DIAZ, M and CUESTA-ALBERTOS, J.A..
    Exploring the global landslide trend
    Submitted.

  2. CUESTA-ALBERTOS, J.A. and DUTTA, S..
    On Perfect Classification for Gaussian Processes.
    Submitted.

  3. BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Some indices to measure departures from stochastic order.
    Submitted.

Papers in peer-reviewed journals

  1. CUESTA-ALBERTOS, J.A. and DUTTA, S..
    On Perfect Clustering for Gaussian Processes.
    Transactions on Machine Learning Research. (2023). The final authenticated version is available online at: https://openreview.net/pdf?id=igDOV2KBwM

  2. GARCIA-PORTUGUES, E., NAVARRO-ESTEBAN, P. and CUESTA-ALBERTOS, J.A.
    On a projection-based class of uniformity tests on the hypersphere
    Bernoulli. (2023), 29, 181-204. The final authenticated version is available online at: https://www.e-publications.org/ims/submission/BEJ/user/submissionFile/50768?confirm=29b83edb

  3. BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    The complex behaviour of Galton rank order statistic.
    Bernoulli. (2022), 28(4), 2123-2150. The final authenticated version is available online at: https://www.e-publications.org/ims/submission/BEJ/user/submissionFile/50619?confirm=3c85ee43

  4. NAVARRO-ESTEBAN, P. and CUESTA-ALBERTOS, J.A.
    High-dimensional outlier detection using random projections
    TEST. (2021), 30, 908-939. The final authenticated version is available online at: https://link.springer.com/article/10.1007/s11749-020-00750-y

  5. HALLIN, M., BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Distribution and Quantile Functions, Ranks, and Signs in Dimension d: a measure transportation approach
    Annals of Statistics. (2021), 49 (2), 1139-1165. The final authenticated version is available online at: https://doi.org/10.1214/20-AOS1996

  6. CENDRERO, A., FORTE, L.M., REMONDO, J., CUESTA-ALBERTOS, J.A.
    Anthropocene geomorphic change. Climate or human activities?
    Earth's Future (2020), Vol. 8(5). The final authenticated version is available online at: https://doi.org/10.1029/2019EF001305

  7. BARRIO, E. del, CUESTA-ALBERTOS, J.A., MATRAN, C. and MAYO-ISCAR, A.
    Robust clustering tools based on optimal transportation
    Statistics and Computing (2019), 29(1), 139-160. The final authenticated version is available online at: https://link.springer.com/article/10.1007/s11222-018-9800-z

  8. CUESTA-ALBERTOS, J.A. GARCIA-PORTUGUES, E., FEBRERO-BANDE, M., and GONZALEZ-MANTEIGA, W.
    Goodness-of-fit tests for the functional linear model based on randomly projected empirical processes.
    Annals of Statistics (2019), Vol. 47, No. 1, 439-467. The final authenticated version is available online at: https://projecteuclid.org/euclid.aos/1543568594

  9. ALVAREZ-ESTEBAN, P.C., BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Wide Consensus aggregation in the Wasserstein Space. Application to location-scatter families
    Bernoulli (2018), Vol. 24, No. 4A, 3147-3179. The final authenticated version is available online at: http://dx.doi.org/10.3150/17-BEJ957

  10. ALVAREZ-ESTEBAN, P.C., BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Models for the assessment of treatment improvement: the ideal and the feasible.
    Statistical Science (2017), Vol. 32, No. 3, 469-485.

  11. CUESTA-ALBERTOS, J.A., FEBRERO-BANDE, M. and OVIEDO DE LA FUENTE, M.
    The DDG-classifier in the functional setting. The final publication is available at Springer via http://dx.doi.org/10.1007/s11749-016-0502-6
    TEST (2017). Vol. 26, 119-142.

  12. ALVAREZ-ESTEBAN, P.C., BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    A contamination model for approximate stochastic order. The final publication is available at Springer via http://dx.doi.org/10.1007/s11749-016-0494-2
    TEST (2016). Vol. 25, 751-774.

  13. ALVAREZ-ESTEBAN, P.C., BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    A fixed-point approach to barycenters in Wasserstein space.
    Journal of Mathematical Analysis and Applications (2016). Vol. 441, 744-762.

  14. NIETO-REYES, A. and CUESTA-ALBERTOS, J.A.
    Discussion on M. Hubert, P. Rousseeuw and P. Segaert: Multivariate functional outlier detection.
    Statistical Methods and their Applications (2015). Vol. 24, 237-243.

  15. AGULLO-ANTOLIN, M., CUESTA-ALBERTOS, J.A., LESCORNEL, H. and LOUBES, M.
    A Parametric Registration model for warped distributions with Wasserstein's distance
    Journal of Multivariate Analysis (2015), Vol. 135, 117-130.

  16. CUESTA-ALBERTOS, J.A., GAMBOA, F. and NIETO-REYES, A.
    A random-projection based procedure to test if a stationary process is Gaussian
    Computational Statistics and Data Analysis (2014), Vol. 75, 124-141.

  17. ALVAREZ-ESTEBAN, P.C., BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Searching for a common pooling pattern among several samples.
    Computational Statistics and Data Analysis (2013), Vol. 67, 1-14.

  18. CUESTA-ALBERTOS, J.A.
    Comments on "Model-free model-fitting and predictive distributions", by Dimitris N. Politis,
    TEST (2013), Vol. 20, 201-209.

  19. LI, J., P.C., CUESTA-ALBERTOS, J.A. and LIU, R..
    DD-Classifier: Nonparametric Classification Procedure Based on DD-plot.
    Journal of the American Statistical Association (2012), Vol. 107, 737-753.

  20. ALVAREZ-ESTEBAN, P.C., BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Similarity of samples and trimming.
    Bernoulli (2012), Vol. 18, 606-634.

  21. BAILLO, A., CUESTA-ALBERTOS, J.A. and CUEVAS, A.
    Supervised classification for a family of Gaussian functional models.
    Scandinavian Journal of Statistics (2011), Vol. 38, 480-498.

  22. ALVAREZ-ESTEBAN, P.C., BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Uniqueness and Approximated Computation of Optimal Incomplete Transportation Plans.
    Annals de l'Institut Henri Poincaré (2011), Vol. 47, 358-375.

  23. BRUSCHI, V.M., CENDRERO, A. and CUESTA ALBERTOS, J.A.
    A Statistical Approach to the Validation and Optimisation of Geoheritage Assessment Procedures.
    Geoheritage (2011), Vol. 3, Issue 3, 131-149.

  24. CUESTA-ALBERTOS, J.A., FEBRERO-BANDE, M.
    Multiway ANOVA for Functional Data.
    TEST (2010) Vol. 19, 537-557.

  25. ALVAREZ-ESTEBAN, P.C., BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Assessing when a sample is mostly normal.
    Computational Statistics and Data Analysis (2010), Vol. 54, 2914-2925.

  26. CUESTA-ALBERTOS, J.A., CUEVAS, A. and FRAIMAN, R.
    On projection-based tests for spherical and compositional data.
    Statistics and Computing (2009), Vol. 19, 4, 367-380.

  27. GONZALEZ-DIEZ, A., SOTO, J., GOMEZ-AROZAMENA, J, BONACHEA , J., MARTINEZ-DIAZ, J.J,
    CUESTA-ALBERTOS, J., OLAGUE, I., REMONDO, J. and DIAZ DE TERAN, J.R.
    Identification of latent faults using a radon test.
    Geomorphology (2009), Vol. 110, Issues 1-2, 11-19.

  28. CUESTA-ALBERTOS, J.A. and NIETO-REYES, A.
    The Tukey and the random Tukey depths characterize discrete distributions.
    Journal of Multivariate Analysis (2008), Vol. 99, 2304-2311.

  29. CUESTA-ALBERTOS, J.A., MATRAN, C. and MAYO-ISCAR, A.
    Trimming and likelihood: Robust location and dispersion estimation in the elliptical model.
    Annals of Statistics (2008), Vol. 36, No. 5, 2284-2318.
    You have a pdf version here

  30. CUESTA-ALBERTOS, J.A., MATRAN, C. and MAYO-ISCAR, A.
    Robust estimation in the normal mixture model based on robust clustering.
    Journal of the Royal Statistical Society. Series B. (2008), Vol. 70, 4, 779-802.

  31. CUESTA-ALBERTOS, J.A. and NIETO-REYES, A.
    The Random Tukey Depth.
    Computational Statistics and Data Analysis (2008), Vol. 52, Issue 11, 4979-4988.

  32. ALVAREZ-ESTEBAN, P.C., BARRIO, E. del, CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Trimmed Comparison of Distributions.
    Journal of the American Statistical Association (2008), Vol. 103, 697-704.

  33. CUESTA-ALBERTOS, J.A., FRAIMAN, R., GALVES, A., GARCIA, J. and SVARC, M..
    Identifying rhythmic classes of languages using their sonority: a Kolmogorov-Smirnov approach.
    Journal of Applied Statistics (2007), Vol. 34, 749-761.

  34. CUESTA-ALBERTOS, J.A. , del BARRIO, E., FRAIMAN, R. and MATRAN, C.
    The random projection method in goodness of fit for functional data.
    Computational Statistics and Data Analysis (2007), Vol. 51, 4814-4831.

  35. CUESTA-ALBERTOS, J.A. and FRAIMAN, R.
    Impartial Trimmed k-means for Functional Data.
    Computational Statistics and Data Analysis (2007), Vol. 51, 4864-4877.

  36. CUESTA-ALBERTOS, J.A., FRAIMAN, R. and RANSFORD, T.
    A sharp form of the Cramer--Wold theorem.
    Journal of Theoretical Probability (2007), Vol. 20, 201-209.

  37. CUESTA-ALBERTOS, J.A., FRAIMAN, R. and RANSFORD, T.
    Random projections and goodness-of-fit tests in infinite-dimensional spaces.
    Bulletin of the Brazilian Mathematical Society (2006), Vol. 37(4), 1-25.

  38. CUESTA-ALBERTOS, J.A. and WSCHEBOR, M.
    Some Remarks on the Condition Number of a Real Random Matrix.
    Journal of Complexity (2003), 19, 548-554.

  39. CUESTA-ALBERTOS, J.A., MATRAN, C. and RODRIGUEZ-RODRIGUEZ, J.
    Approximation to probabilities through uniform laws on convex sets.
    Journal of Theoretical Probability (2003), 16, 363-376.

  40. CUESTA-ALBERTOS, J.A., GARCIA-ESCUDERO, L.A. and GORDALIZA, A.
    On the asymptotics of trimmed best k-nets.
    Journal of Multivariate Analysis. (2002), 82, 482-516.

  41. BARRIO, E., CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Asymptotic stability of the bootstrap sample mean.
    Stochastic Processes and their Applications. (2002), 97, 289-306.

  42. BAILLO, A., CUESTA-ALBERTOS, J.A., and CUEVAS, A., A.
    Convergence rates in nonparametric estimation of level sets.
    Statistics and Probability Letters. (2001), 53, 27-35.

  43. BARRIO, E., CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Contributions of empirical and quantile processes to the asymptotic theory of goodness-of-fit-tests (with discussion).
    TEST (2000), 9, 1-96.

  44. BARRIO, E., MATRAN, C., RODRIGUEZ-RODRIGUEZ, J. and CUESTA-ALBERTOS, J.A.
    Tests of goodness of fit based on the L2-Wasserstein distance.
    Annals of Statistics (1999), 27, 1230-1239.

  45. BARRIO, E., CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Necessary Conditions for the Bootstrap of the Mean of a Triangular Array.
    Ann. I. Henri Poincaré (1999), 35, 371-387.

  46. CUESTA-ALBERTOS, J.A. and MATRAN, C.
    Extension of consistency results related to the stochastic order.
    Sankhya (1999), 61, Series A, 62-71.

  47. CUESTA-ALBERTOS, J.A. and MATRAN, C.
    The asymptotic distribution of the bootstrap sample mean of an infinitesimal array.
    Ann. I. Henri Poincaré (1998), 34, 23-48.

  48. CUESTA-ALBERTOS, J.A., GORDALIZA, A. and MATRAN, C.
    On the geometric behavior of multidimensional centralization measures.
    J. Stat. Planning and Inference. (1998), 67, 191-208.

  49. CUESTA-ALBERTOS, J.A., GORDALIZA, A. and MATRAN, C.
    Trimmed best k-nets: A robustified version of a L$\infty$-based clustering method.
    Statistics and Probability Letters. (1998), 36, 401-413.

  50. CUESTA-ALBERTOS, J.A., GORDALIZA, A. and MATRAN, C.
    Trimmed k-means: An attempt to robustify quantizers.
    Annals of Statistics (1997), 25, 553-576.

  51. CUESTA-ALBERTOS, J.A., MATRAN, C. and TUERO-DIAZ, A.
    On the Monotonicity of Optimal Transportation Plans.
    J. Math. Anal. and its Applicat. (1997), 215, 86-94.

  52. CUESTA-ALBERTOS, J.A., MATRAN, C. and TUERO-DIAZ, A.
    Optimal transportation plans and convergence in distribution.
    Journal of Multivariate Analysis. (1997), 60, 72-83.

  53. CUESTA-ALBERTOS, J.A., MATRAN, C. RACHEV, S.T., RÜSCHENDORF, L.
    Mass transportation problems in probability theory.
    Math. Scientist. (1996), 21, 34-72.

  54. CUESTA-ALBERTOS, J.A, MATRAN, C and TUERO-DIAZ, A.
    On lower bounds for the L2-Wasserstein metric in a Hilbert space.
    Journal of Theoretical Probability (1996), 9, 263-283.

  55. ARENAL-GUTIERREZ, E., MATRAN, C and CUESTA-ALBERTOS, J.A.
    On the conditional strong law of large numbers for the bootstrap mean.
    Statistics and Probability Letters (1996), 27, 49-60.

  56. ARENAL-GUTIERREZ, E., MATRAN, C and CUESTA-ALBERTOS, J.A.
    Unconditional Glivenko-Cantelli-type theorems and weak laws of large numbers for bootstrap.
    Statistics and Probability Letters (1996), 26, 365-375.

  57. CUESTA-ALBERTOS, J.A., DOMINGUEZ-MENCHERO, J. S. and MATRAN, C.
    Consistency of Lp-best monotone approximations.
    Journal of Statistical Planning and Inference (1995), 47, 295-318.

  58. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Stochastic convergence through Skorohod representation theorems and Wasserstein distances.
    Rendic. Circol. Matem. di Palermo. Ser. II (1994) 35, 89-113.

  59. CUESTA-ALBERTOS, J. A., DOMINGUEZ-MENCHERO, J. S. and MATRAN, C.
    Some stochastic on monotone functions.
    Journal of Computational and Applied Mathematics (1994) 55, 165-182.

  60. CUESTA-ALBERTOS, J. A. and TUERO, A.
    A Characterization of the Monge-Kantorovich mass transference problem.
    Statistical and Probability Letters (1993), 16, 147-152

  61. CUESTA-ALBERTOS, J. A., RÜSCHENDORF, L. and TUERO, A.
    Optimal coupling of multivariate distributions and stochastic processes.
    Journal of Multivariate Analysis (1993), 46, 335-361.

  62. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    A review on strong convergence of weighted sums of random elements based on Wasserstein metrics.
    Journal of Statistical Planning and Inference (1992), 30, 359-370.

  63. CUESTA-ALBERTOS, J. A. , DOMINGUEZ, J.S. and MATRAN, C.
    On the consistency of the Lp-isotonic regression.
    Theory of Probability and its Applications (1992), 37, 129-132.

  64. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    On the asymptotic behavior of sums of pairwise independent random variables.
    Statistical and Probability Letters (1991), 11, 201-210.

  65. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    A short proof of the Law of Convergence of Types.
    Sankhyá, Ser. A, (1990) 52, 259-260.

  66. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Uniform consistency of r-means.
    Statistical and Probability Letters (1989) 6, 65-71

  67. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Conditional bounds and best L∞-approximations in probability spaces.
    Journal of Approximation Theory (1989) 56, 1-12.

  68. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Notes on the Wasserstein metric in Hilbert spaces.
    Annals of Probability (1989) 17, 1264-1276.

  69. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Strong convergence of weighted sums of random elements through the equivalence of sequences of distributions.
    Journal of Multivariate Analysis (1988) 25, 311-322

  70. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    The Strong Law of Large Numbers for k-means and best possible nets of banach valued random variables.
    Probability Theory and Related Fields (1988) 78, 523-534

  71. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Asymptotic behavior of p-predictions for vector valued random variables.
    Proceedings American Mathematical Society (1987) 100, 4, 716-720.

  72. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Lp-Linear Regression, Consistency and Significative Regression in Median.
    Journal of Statistical Planninng and Inference, (1986) 13, 15-30.

  73. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Strong Laws of Large Numbers in abstract spaces via Skorohod's representation theorem.
    Sankhyá, Ser. A (1986) 48, 98-103.

  74. CUESTA-ALBERTOS, J. A.
    Medidas de Centralización Multidimensionales (Ley Fuerte de los Grandes Números).
    Trabajos de Estadística e Investigación Operativa, (1984) 35, 3-16.

  75. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    p-predictions of Vector Valued Random Variables.
    Publicaciones de la Sección de Matemáticas, Universidad de Valladolid, (1984) 9, 85-103

  76. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Semirecorrido condicionado. Expresión asintótica de la r-esperanza condicionada.
    Trabajos de Estadística e Investigación Operativa, (1983) 34, 54-60.

  77. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Regresión significativa en mediana.
    Publicaciones de la Sección de Matemáticas, Universidad de Valladolid, (1983) 6, 125-137.

  78. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Sobre la Ley Fuerte de los Grandes Números para una medida de centralización bivaluada.
    Cuadernos de Bioestadística y sus Aplicaciones Informáticas, (1983) 1, 463-467.

  79. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Notas sobre la continuidad de la p-esperanza.
    Publicaciones de la Sección de Matemáticas, Universidad de Valladolid, (1982) 4, 68-73.

Discussions, Book Contributions, Conference Proceedings and Technical Reports

  1. GARCIA-PORTUGUES, E., NAVARRO-ESTEBAN, P. and CUESTA-ALBERTOS, J.A.
    A Cramer-von Mises test of uniformity on the hypersphere
    In Balzano S., Porzio G.C., Salvatore R., Vistocco D., Vichi M. (eds) Statistical Learning and Modeling in Data Analysis. CLADAG 2019. Studies in Classification, Data Analysis, and Knowledge Organization (2021), pags. 107-116. Springer, Cham.
    The published version can be downloaded from https://link.springer.com/chapter/10.1007/978-3-030-69944-4_12

  2. del BARRIO, E., CUESTA-ALBERTOS, J.A. and MATRAN, C.
    An optimal transportation approach for assessing almost stochastic order
    In Gil E., Gil E., Gil J., Gil M. (eds) The Mathematics of the Uncertain. Studies in Systems, Decision and Control, vol 142, (2018), pags. 33-44. Springer, Cham
    The published version can be downloaded from https://link.springer.com/chapter/10.1007/978-3-319-73848-2_3

  3. CUESTA-ALBERTOS, J.A.
    Soluciones Estadísticas simples para algunos problemas complicados.
    In Estadística para todo(s). Eds. L.A. Fernández Fernández and F. Etayo Gordejuela. Universidad de Cantabria (2014), ISBN: 978-84-8102-721-1, pp 65-144.

  4. CUESTA-ALBERTOS, J.A. and NIETO-REYES, A.
    Functional classification and the random Tukey depth. Practical issues
    Combining Soft Computing and Statistical Methods in Data Analysis. Advances in Intelligent and Soft Computing, Vol. 77.
    Eds. Borgelt, C.; Rodriguez, G.G.; Trutschnig, W.; Lubiano, M.A.; Gil, M.; Grzegorzewski, P.; Hryniewicz, O.     (2010) 123-130.

  5. CUESTA-ALBERTOS, J.A. and NIETO-REYES, A.
    A Random Functional Depth.
    Functional and Operational Statistics. Eds. S. Dabo-Niang and F. Ferraty.
    Physica-Verlag, (2008), 121-126.

  6. CUESTA-ALBERTOS, J.A., MATRAN, C. and MAYO-ISCAR, A.
    Estimators based in adaptively trimming cells in the mixture model.
    Technical report (2007)

  7. CUESTA-ALBERTOS, J.A. and FRAIMAN, R.
    Impartial means for functional data.
    Data Depth: Robust Multivariate Statistical Analysis, Computational Geometry & Applications. Eds. R. Liu, R. Serfling and D. Souvaine.
    American Mathematical Society in DIMACS Series (2006), Vol. 72, 121-145.

  8. CUESTA-ALBERTOS, J.A. and WSCHEBOR, M.
    Condition Numbers and Extrema of Random Fields.
    Seminar on stochastic analysis, random fields and applications IV. Eds. R.Dalang, M.Dozzi, F.Russo.
    Birkhauser, Progress in Probability Series (2004), Vol. 58, pp. 69-82.

  9. CUESTA-ALBERTOS, J.A., MATRAN, C. and RODRIGUEZ-RODRIGUEZ, J.
    Shape of a distribution through the L2-Wasserstein distance
    In Proceedings of Distributions with Given Marginals and Statistical Modelling. Eds. C.M. Cuadras, J. Fortiana and J.A. Rodriguez-Lallena (2002). Kluwer Ac. Pub. pp. 51-62.
    The final authenticated version is available online at: https://link.springer.com/chapter/10.1007/978-94-017-0061-0_7 .

  10. CUESTA-ALBERTOS, J.A. MATRAN, C. and TUERO-DIAZ, A.
    Optimal maps for the L2-Wasserstein distance.
    Technical report (1996)

  11. CUESTA-ALBERTOS, J.A., GORDALIZA, A. and MATRAN, C.
    Trimmed k-means and the Cauchy Mean-Value property.
    In New trends in Probability and Statistics.Vol 3 Multivariate Statistics and Matrices in Statistics. Proceedings of the 5th Tartu Conference. (1995). TEV, Vilnius. pp. 247-265.

  12. CUESTA-ALBERTOS, J. A. and MATRAN, C.
    Some properties of p-predictions for Banach-valued random elements.
    In Aportaciones Matemáticas en honor del Profesor Victor Manuel Onieva Aleixandre. (1991). Universidad de Cantabria, 147-154.

  13. CUESTA-ALBERTOS, J. A.
    Comentarios al artículo: Una revisión de resultados recientes en estimación de densidades; por Antonio Cuevas.
    Estadística Española, (1989) 31, 120, 47-50.


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