K. H. Drexhage, H. Kuhn, F. P. Schäfer. Variation of the Fluorescence Decay Time of a Molecule in Front of a Mirror. BERICHTE DER BUNSEN-GESELLSCHAFT FUR PHYSIKALISCHE CHEMIE. 1968, 72: 329. doi:10.1002/bbpc.19680720261.
K. H. Drexhage. Influence of a dielectric interface on fluorescence decay time. Journal of Luminescence. 1970, 1: 693. doi:10.1016/0022-2313(70)90082-7.