V. Zinchenko, I. Magunov, G. Nechyporenko, I. Stoyanova, and L. Sadkovska, “Spectroscopic Research of Interaction in the Systems Ge-In2O3- M xOy (M-Sn(IV), La, Sm, Eu)”, Phys. Chem. Sol. State, vol. 18, no. 3, pp. 347–353, Sep. 2017.