1. Department of Mathematics, School of Applied Sciences, REVA University, Bengaluru, India
2. Department of Mathematics and Sciences, College of Humanities and Sciences, Prince Sultan University, Riyadh, Saudi Arabia
3. Department of Mathematics, Faculty of Science, The Hashemite University, Zarqa, Jordan
4. Department of Mathematics, CSSR & SRRM Degree & PG College, Kamalapuram, India