Gadolinium-activated 'CA''ZR' IND. 4''O' IND. 9' ultraviolet-'B'-emitting phosphor: a luminescence and EPR study - Singh, Vijay; Singh, N.; Rao, T K Gundu; Pathak, M. S.; Srivastava, A. K.; Singh, P. K.; Dhoble, S. J.; Watanabe, Shigueo (JOURNAL OF ELECTRONIC MATERIALS, 2017)