Energy-dependent light quenching in CaWO4 crystals at mK temperatures - Strauss, R; Angloher, G; Bento, A; Bucci, C; Canonica, L; Carli, W; Erb, A; von Feilitzsch, F; Gorla, P; Guetlein, A; Hauff, D; Hellgartner, D; et al. (2014)