1. Department of Mathematics, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
2. Department of Basic Sciences, University of Engineering and Technology, Peshawar, Khyber Pakhtunkhwa, Pakistan
3. Section of Mathematics, International Telematic University Uninettuno, Corso Vittorio Emanuele II 39, 00186 Roma, Italy
4. Department of Mathematics, Government College University, Faisalabad 38000, Pakistan
5. Department of Mathematics, Faculty of Science, Cumhuriyet University, Sivas, Turkey
6. Department of Mathematics, Huzhou University, Huzhou 313000, China