Saurabh Porwal
Department of Mathematics, University Institute of Engineering and Technology Campus, Chhatrapati Shahu Ji Maharaj University, Kanpur-208024 UP, U.P. India
K. K. Dixit
Department of Engineering Mathematics, Gwalior Institute of Information Technology, Airport Road, Maharajpura, Gwalior-474015 UP, M.P.India
S. B. Joshi
Department of Mathematics, Walchand College of Engineering Sangli-416415, Maharashtra, India