1. Department of Mathematics , Vasantrao Naik Mahavidyalaya , Cidco, Aurangabad , India
2. Department of Mathematics , Dr. Babasaheb Ambedkar Marathwada University , Aurangabad , India
3. Department of Mathematics, Computer Science , Taiz University , Taiz - , Yemen
4. Navin Jindal School of Management , University of Texas at Dallas , Dallas , , USA
5. Department of Mathematics , Hamedan Branch, Islamic Azad University , Hamedan , Iran