1. Department of Applied Science & Humanities Government engineering College, Siwan, Bihar, Pin–841226, INDIA
2. Department of Mathematics, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Amaravati, Andhra Pradesh–522503, INDIA
3. Department of Mathematics, Motilal Nehru National Institute of Technology, Allahabad, Uttar Pradesh–211004, India. (Till April 2021)
4. Department of Mechanical Engineering Motihari College of Engineering, Motihari, Bihar, Pin- 845401, INDIA