Statistics & Probability Letters
Statistics and Probability Letters > 2004 > 68 > 4 > 407-413
Statistics and Probability Letters > 2004 > 69 > 1 > 21-27
Statistics and Probability Letters > 2004 > 68 > 4 > 407-413
Statistics and Probability Letters > 2004 > 69 > 1 > 21-27