1. Department of Mathematics, College of Science, King Khalid University, Abha, Saudi Arabia
2. Department of Mathematics, Institute of Arts and Sciences, Government College University Faisalabad Chiniot Campus, Chiniot, Pakistan
3. Graduate School, Wesleyan University Philippines, Cabanatuan, Philippines
4. Department of Mathematical Sciences, (FBAS) BUITEMS, Quetta, Pakistan
5. Department of Mathematics, Riphah International University Faisalabad, Faisalabad, Pakistan