Login New user?   Sohag Journal of Mathematics An International Journal   SJM Home   Submit an Article   Content   Forthcoming Papers   Subscription Author     Name : Nasser Abdo Saeed Bulkhali Address : Department of Mathematics, Faculty of Education-Zabid, Hodeidah University, Hodeidah, Yemen Email : nassbull@hotmail.com Telephone : 00967702261364   Home   About us   News   Journals   Conferences Contact us Copyright naturalspublishing.com. All Rights Reserved