Spectroscopic Research of Interaction in the Systems Ge-In2O3-MxOy (M-Sn(IV), La, Sm, Eu) Journal title: Фізика і хімія твердого тіла Authors: V. F. Zinchenko, I. R. Magunov, G. V. Nechyporenko, I. V. Stoyanova, L. V. Sadkovska Subject(s):