Author(s) affiliations:K. K. Mueen Ahmed1, Madhu Bansal2*, B. M. Gupta3
1Phcog.Net, 17, Buddha Vihar Road, Cox Town, Bengaluru 560005, INDIA.
2Department of Mathematics, Panjab University, A,C. Joshi Library, Chandigarh–160014, INDIA.
31173 Sector 15, Panchkula 134113, Haryana, INDIA.