1. O. P. Krivoruchko, R. A. Buyanov: Thermodynamics and Structure of Hydroxocomplexes in Solution (Abstracts), p. 19. Nauka, Leningrad 1980.
2. O. P. Krivoruchko, R. A. Buyanov: in Scientific Foundations for Catalysts Technology, Proceedings of the Coordination Center, Vol. 3, p. 3. Novosibirsk 1980.
3. K. Torkar, H. Krischner: Symp. Bauxites, Oxides, Hydroxides Alumin., Zagreb, Vol. I, p. 25, 1963.