1. Department of Mathematics, Faculty of Technical Science, University Ismail Qemali, Vlora, Albania
2. Department of Mathematics, Institute of Technical Education and Research, Siksha O Anusandhan University, Bhubaneswar 751030, Odisha, India
3. Department of Basic Sciences and Related Studies, Mehran University of Engineering and Technology, Jamshoro 76062, Pakistan
4. Department of Mathematics, Taiz University, Taiz 96704, Yemen
5. Department of Mathematics, Hamedan Branch, Islamic Azad University, Hamedan, Iran
6. Department of Mathematics, College of Education, University of Sulaimani, Kurdistan Region, Sulaimani, Iraq
7. Department of Mathematics & Computer Science, Taiz University, Taiz, Yemen