Statistics & Probability Letters
Statistics and Probability Letters > 2003 > 61 > 1 > 111-121
Statistics and Probability Letters > 2003 > 62 > 2 > 137-144
Statistics and Probability Letters > 2003 > 61 > 1 > 111-121
Statistics and Probability Letters > 2003 > 62 > 2 > 137-144