1. 1. Kalychak Ya. M., Zaremba V. I., Pöttgen R., Lukachuk M., Hoffmann R.-D. Rare Earth-Transition Metal-Indides. In: K. A. Gschneidner, Jr., J.-C. Bünzli, V. K. Pecharsky (Eds.). Handbook on the Physics and Chemistry of Rare Earths. Elsevier, Amsterdam. 2005. Vol. 34. P. 1-133. (https://doi.org/10.1016/S0168-1273(04)34001-8).
2. 2. Kalychak Ya. M. Isothermal section of phase diagrams and crystal structures of compounds in the R-Cu-In systems. Metally. 1998. Vol. 4. P. 110-118 (in Russian).
3. 3. Markiv V.Y., Belyavina N.N., Zhunkovskaya T.I. The X-ray structure investigation of the Y-Cu-Ga system alloys and RECu2-REGa2 sections. Dopov. Akad. Nauk Ukr. RSR, Ser. A. 1982. Vol. 2. P. 80-83 (in Ukrainian).
4. 4. Mykhalichko O.B. Phase equilibria and crystal structures of compounds in the {La, Gd, Er}-Cu-Ga-Si systems at 600 °C: Ph.D. thesis, Lviv National University, Lviv. 2013. 20 p. (in Ukrainian).
5. 5. Dwight A.E. Rare earth-Au(Cu)-X compounds with the Fe2P-, CaIn2-, and MgAgAs-types. Proc. Rare Earth Res. Conf., 12th, Colorado. 1976. Vol. 1. P. 480-489.