مؤلف: Mohammad Arashi

A. K. Md. EHSANES SALEH, Ph D, is a Professor Emeritus and Distinguished Research Professor in the school of Mathematics and Statistics, Carleton University, Ottawa, Canada. MOHAMMAD ARASHI, Ph D, is an Associate Professor at Shahrood University of Technology, Iran and Extraordinary Professor and C2 rated researcher at University of Pretoria, Pretoria, South Africa. B. M. GOLAM KIBRIA, Ph D, is a Professor in the Department of Mathematics and Statistics at Florida International University, Miami, FL.