Librantz, A.F.H. et al. 2008. Study of UV fluorescences induced from 4f3 T 4f25d multistep absorptions of Nd3+ions in YLiF4 and LuLiF4 crystals. Exacta. 4, 1 (mar. 2008), 179–183. DOI:https://doi.org/10.5585/exacta.v4i1.671.