Reshak, A. H. and Parasyuk, O. V. and Fedorchuk, A. O. and Kamarudin, H. and Auluck, S. and Chysky, J. (2013) Optical Spectra and Band Structure of AgxGaxGe1-xSe2 (x=0.333, 0.250, 0.200, 0.167) Single Crystals: Experiment and Theory. Journal of Physical Chemistry B, 117 (48). pp. 15220-15231. ISSN 1520-6106