Login New user?   Journal of Statistics Applications & Probability Letters An International Journal   JSAPL Home   Submit an Article   Content   Forthcoming Papers   Subscription Author     Name : S. E. Abu-Youssef Address : Department of Mathematics, Faculty of Science, Al-Azhar University, Nasr City (11884), Cairo, Egypt. Email : abuyousf@hotmail.com Telephone :   Home   About us   News   Journals   Conferences Contact us Copyright naturalspublishing.com. All Rights Reserved