1. Department of Mathematics, Graphic Era Deemed to be University, Dehradun, Uttarakhand, India
2. Department of Mathematics, Graphic Era Hill University, Dehradun, Uttarakhand, India
3. Department of Mathematics, Computer Science and Engineering, Graphic Era Deemed to be University, Dehradun, Uttarakhand, India
4. School of Computer Science Engineering & Applications, D. Y. Patil International University (DYPIU), Pune, India