1. Department of Mathematics, School of Computer Science Engineering and Technology, Bennett University, Greater Noida 201310, India
2. Teerthankeer Mahaveer Institute of Management and Technology, Teerthanker Mahaveer University, Moradabad 244001, India
3. Department of Mathematics, Amity Institute of Applied Sciences, Amity University Uttar Pradesh, Noida 201301, India
4. Department of Mathematics, Ramjas College, University of Delhi, New Delhi 110007, India