Statistics & Probability Letters
Statistics and Probability Letters > 2003 > 62 > 4 > 407-412
Statistics and Probability Letters > 2003 > 64 > 4 > 369-379
Statistics and Probability Letters > 2003 > 62 > 4 > 407-412
Statistics and Probability Letters > 2003 > 64 > 4 > 369-379