Reshak, A. H. and Kogut, Y. M and Fedorchuk, A. O. and Zamuruyeva, O. V. and Myronchuk, G. L. and Parasyuk, O. V. and Kamarudin, H. and Auluck, S. and Plucinski, K. J. and Bila, Jiri (2013) Linear, non-linear optical susceptibilities and the hyperpolarizability of the mixed crystals Ag0.5Pb1.75Ge(S1-xSex)(4): experiment and theory. Physical Chemistry Chemical Physics, 15 (43). pp. 18979-18986. ISSN 1463-9076