1. School of Engineering and Technology, Chitkara University, Baddi, Solan, Himachal Pradesh, India
2. Department of Mathematics, NSCBM Government College Hamirpur, Himachal Pradesh, India
3. Govt. College Ladbhadol, Mandi, Himachal Pradesh, India
4. School of Basic Sciences, Bahra University, Waknaghat, Himachal Pradesh, India