AUTONOMY IN THE RUSSIAN FEDERATION: THEORY AND PRACTICE СтатьяKartashkin V.A., Abashidze A.Kh.International Journal on Minority and Group Rights. Том 10. 2003. С. 203-220
PHASE DIAGRAM OF THE PR2O3-VO SYSTEM СтатьяBogatov Y.E., Okot A.O., Molodkin A.K., Safronenko M.G.ЖУРНАЛ НЕОРГАНИЧЕСКОЙ ХИМИИ. Том 41. 1996. С. 1558-1560