1. Department of Mathematics, College of Science, King Khalid University, Abha 61413, Saudi Arabia
2. Department of Mathematics, Sambalpur University, Sambalpur 768019, India
3. Department of Mathematics, JIS College of Engineering, Kalyani, West Bengal 741235, India
4. Department of Mathematics, Applied Science Cluster, University of Petroleum and Energy Studies (UPES), Dehradun, Uttarakhand 248007, India
5. Department of Mathematics and Computer Science, University of Catania, Catania 95125, Italy