Statistics & Probability Letters
Statistics and Probability Letters > 2007 > 77 > 3 > 256-264
Statistics and Probability Letters > 2007 > 77 > 7 > 681-686
Statistics and Probability Letters > 2007 > 77 > 3 > 256-264
Statistics and Probability Letters > 2007 > 77 > 7 > 681-686