STUDY OF POTENTIAL STABILIZATION OF NIOBIUM(IV) IN OXIDE COMPOUNDS OF REE СтатьяSAFRONENKO M.G., BOGATOV Y.E., MOLODKIN A.K.ЖУРНАЛ НЕОРГАНИЧЕСКОЙ ХИМИИ. Том 37. 1992. С. 1735-1743
STUDY OF NIOBIUM(IV) OXIDE INTERACTION WITH REE OXIDES СтатьяSAFRONENKO M.G., BOGATOV Y.E., MOLODKIN A.K.ЖУРНАЛ НЕОРГАНИЧЕСКОЙ ХИМИИ. Том 37. 1992. С. 11-18
CHARACTERISTICS OF NIOBIUM(II) OXIDE INTERACTION WITH OXIDES OF RARE-EARTH ELEMENTS СтатьяSAFRONENKO M.G., BOGATOV Y.E., MOLODKIN A.K.ЖУРНАЛ НЕОРГАНИЧЕСКОЙ ХИМИИ. Том 36. 1991. С. 1921-1928
STUDY OF LANTHANUM OXIDE INTERACTION WITH NIOBIUM(II) AND NIOBIUM(IV) OXIDES СтатьяSAFRONENKO M.G., BOGATOV Y.E., MOLODKIN A.K.ЖУРНАЛ НЕОРГАНИЧЕСКОЙ ХИМИИ. Том 33. 1988. С. 2650-2653
STUDY OF ERBIUM OXIDE INTERACTION WITH NIOBIUM(II) OXIDE СтатьяSAFRONENKO M.G., BOGATOV Y.E., MOLODKIN A.K.ЖУРНАЛ НЕОРГАНИЧЕСКОЙ ХИМИИ. Том 32. 1987. С. 2000-2003