Funding for this research was provided by:
National Board for Higher Mathematics, Department of Atomic Energy, Government of India (2/48(10)/2013/NBHM(R.P.)/R & D II/695)
Article History
Received: 10 February 2018
Revised: 15 September 2018
Accepted: 4 October 2018
First Online: 26 October 2018