Statistics & Probability Letters
Statistics and Probability Letters > 2007 > 77 > 2 > 148-150
Statistics and Probability Letters > 2007 > 77 > 12 > 1190-1200
Statistics and Probability Letters > 2007 > 77 > 2 > 148-150
Statistics and Probability Letters > 2007 > 77 > 12 > 1190-1200