1. Department of Mathematics and Statistics, The University of Lahore, Lahore 54590, Pakistan
2. Department of Computer Science and Mathematics, Lebanese American University, Beirut 5053, Lebanon
3. Faculty of Arts and Sciences, Department of Mathematics, Near East University, Lefkoşa 99138, Turkey
4. Art and Science Faculty, Department of Mathematics, Siirt University, Siirt 56100, Turkey
5. Institute of Mathematics, Khawaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan
6. Department of Mathematics, Sait University, Calgary, AB 56000, Canada
7. Department of Electricity and Electronics, Institute of Research and Development of Processes, Faculty of Science and Technology, University of the Basque Country, 48940 Leioa, Spain