1. Department of Engineering Mathematics, Koneru Lakshmaiah Eduacation Foundation, Vaddeswaram, Guntur, AP, India
2. Department of Applied Mathematics, KRU Dr. MRAR College of PG Studies, Krishna University, Nuzvid, AP, India
3. Department of Mathematics, College of Science, King Khalid University, Abha, Saudi Arabia
4. Department of Mathematics, College of Science, Northern Border University, Arar, Saudi Arabia
5. Department of Mathematics, Dhanekula Institute of Engineering & Technology, Ganguru, Vijayawada, AP, India