O. Kornienko, O. Bykov, Sameliuk А., and Y. . Yurchenko, “PHASE RELATION STUDIES IN THE CeO2-La2O3-Eu2O3 SYSTEM AT 1250 °С”, Ukr. Chem. Journ., vol. 86, no. 3, pp. 35–47, Apr. 2020.