M. V. Sivers, C. Ciemniak, A. Erb, F. V. Feilitzsch, A. Guetlein, J-C. Lanfranchi, J. Lepelmeier, A. Muenster, W. Potzel, S. Roth, R. Strauss, U. Thalhammer, S. Wawoczny, M. Willers, A. Zoeller: Influence of annealing on the optical and scintillation properties of CaWO4 single crystals. 2012Optical Materials: 34. ISBN 0925-3467 http://dx.doi.org/10.1016/j.optmat.2012.05.014