Narrowband ultraviolet 'B' emitting 'GD' doped 'CA''AL' IND. 2''O' IND. 4' phosphors: an ESR and photoluminescence study - Pathak, M. S.; Lee, Jung-Kul; Singh, N.; Rao, T. K. Gundu; Singh, Vijay; Seshadri, M.; Watanabe, Shigueo (Journal of Luminescence, 2018)