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Journal of Multivariate Analysis > 2003 > 87 > 2 > 370-397
Statistics and Probability Letters > 2003 > 62 > 1 > 1-7
Journal of Multivariate Analysis > 2003 > 87 > 2 > 370-397
Statistics and Probability Letters > 2003 > 62 > 1 > 1-7