1. Department of Mathematics & Statistics, Manipal University Jaipur, Jaipur 303007, Rajasthan, India
2. Department of Computer & Communication Engineering, Manipal University Jaipur, Jaipur 303007, Rajasthan, India
3. Department of Mathematics, S. S. Jain Subodh P. G. College, Jaipur 302004 Rajasthan, India
4. Section of Mathematics, International Telematic University UNINETTUNO, Corso Vittorio Emanuele II, 39, Roma 00186, Italy
5. Near East University, Operational Research Center in Healthcare, Nicosia, PC: 99138 TRNC Mersin 10, Turkey
6. Department of Computer Science and Mathematics, Lebanese American University, Beirut Lebanon
7. Department of Mathematics, College of Science, King Saud University, P. O. Box 2455 Riyadh 11451, Saudi Arabia