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Fischer, S.; Steinkemper, H.; Krämer, Karl; Goldschmidt, J.C. (2012). Concepts to enhance the efficiency of upconversion for solar applications. In: Wehrspohn, Ralf; Gombert, Andreas (eds.) Photonics for Solar Energy Systems IV. Proceedings of SPIE: Vol. 8438 (p. 843806). Bellingham: SPIE 10.1117/12.922183
