1. Department of Mathematics, University of Azad Jammu & Kashmir, Muzaffarabad, Pakistan
2. Department of Computer Programing Baskale Vocational School, Van Yuzuncu Yil University, Van, Turkey
3. Department of Mathematics, Riphah International University, Lahore, Pakistan
4. Department of Mathematics, Mirpur University of Science and Technology (MUST), Mirpur, Pakistan