1. Department of Mathematics, G.D. Goenka University, Gurgaon, India.
2. Department of Mathematics, G.D. Goenka University, Gurgaon, India.
3. Department of Operations Management and Quantitative Techniques, International Management Institute, Kolkata, West Bengal, India.
4. Amity Center for Interdisciplinary Research, Amity University, Noida, Uttar Pradesh, India.