Saini, N.L.Rao, K.V.R.Singh, J.Garg, K.B.Chandra, U.Jain, D.C.Chauhan, H.S.2016-07-042016-07-041989Kandy School of Science: Second International Symposium on Solid State Physics:p.15https://dl-ifs.nsf.gov.lk/handle/1/1517Article