1. Department of Allied Sciences, Graphic Era Hill University, Haldwani, Uttarakhand, India
2. Department of Applied Sciences, SoET, BML Munjal University, Gurgaon, Haryana, India
3. Department of Mathematics, Graphic Era Deemed to be University, Dehradun, Uttarakhand, India
4. Department of Mathematics, Graphic Era Hill University, Bhimtal, Uttarakhand, India