Zahid Akhtar
Department of Mathematics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
Hafiz Fukharuddin
Department of Mathematics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
Ali Ahmad
College of computer Science and information systems, Jazan University, Jazan, Saudi Arabia
Muhammad Ibrahim
Center for Advanced Studies in Pure and Applied Mathematics, Bahauddin Zakariya University, Multan, Pakistan