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Krumpel, A. H.; van der Kolk, E.; Zeelenberg, D.; Bos, A. J. J.; Krämer, Karl; Dorenbos, P. (2008). Lanthanide 4f-level location in lanthanide doped and cerium-lanthanide codoped NaLaF4 by photo- and thermoluminescence. Journal of applied physics, 104(7), p. 73505. Melville, N.Y.: American Institute of Physics 10.1063/1.2955776
