1. Department of Mathematics, Faculty of Science, King Mongkut's University of Technology, Thonburi (KMUTT), 126 Pracha-Uthit Road, Bang Mod, Thrung Khru, Bangkok 10140, Thailand
2. Department of Mathematics and Statistics, University of Swat, Khyber Pakhtunkhawa, Pakistan
3. Department of Mathematics, Faculty of Science, King Khalid University, Abha 62529, Saudi Arabia