1. Yu.N. Grin, R.E. Gladyshevskii, Gallides, Metallurgiya, Moscow, 1989 (in Russian).
2. P. Villars (Ed.), Pearson’s Handbook, Crystallographic Data for Intermetallic Phases, ASM Materials Park, OH, 1997.
3. Equiatomic Intermetallic Europium Compounds: Syntheses, Crystal Chemistry, Chemical Bonding, and Physical Properties
4. R.V. Lapunova, PhD thesis, Lviv State University, Lviv, Ukraine, 1989 (in Russian).