1. SoET, BML Munjal University, Gurugram, India
2. Department of Mathematics, Graphic Era Hill University, Dehradun, India
3. Department of Mathematics, Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar, India
4. Department of Mathematics, Graphic Era (Deemed to be University), Dehradun, India
5. Department of Mathematics, Graphic Era Hill University, Bhimtal, India