Statistics & Probability Letters
Statistics and Probability Letters > 2004 > 66 > 2 > 91-103
Statistics and Probability Letters > 2004 > 70 > 2 > 127-135
Statistics and Probability Letters > 2004 > 66 > 2 > 91-103
Statistics and Probability Letters > 2004 > 70 > 2 > 127-135