1. Sheikh Taimur Academic Block-II, Department of Mathematics, University of Peshawar, Pakistan
2. Industrial Engineering Department, College of Engineering, King Saud University, Riyadh, Saudi Arabia
3. Department of Computer Science and Mathematics, Lebanese American University, Beirut, Lebanon
4. School of Mathematical Sciences, Jiangsu University, Zhenjiang, P.R. China
5. Mathematics Department, City University of Science and Information Technology, Peshawar, Pakistan