Statistics & Probability Letters
Statistics and Probability Letters > 2003 > 63 > 1 > 97-105
Statistics and Probability Letters > 2003 > 63 > 4 > 333-338
Statistics and Probability Letters > 2003 > 65 > 2 > 127-137
Statistics and Probability Letters > 2003 > 65 > 4 > 379-388