1. Department of Mathematics, Govt. P.G. College Hisar, Haryana 125001, India
2. Amity Institute of Information Technology, Amity University, Rajasthan, Jaipur 303002, India
3. Department of Mathematics, University of Rajasthan, Jaipur 302004, Rajasthan, India
4. Department of Mathematics, JECRC University, Jaipur 303905, Rajasthan, India