1. Ferromanganese Nodules of the World Ocean, Ed. by Yu. B. Kazmin (Nedra, Leningrad, 1984) [in Russian].
2. Ferromanganese Crusts and Nodules of Pacific Seamounts, Ed. by A. P. Lisitsina (Nauka, Moscow, 1990) [in Russian].
3. Cobalt-Rich Ores in the World Ocean, ed. by S. I. Andreev (VNII Okeangeologiya, St. Petersburg, 2002) [in Russian].
4. G. N. Baturin, Geochemistry of Oceanic Ferromanganese Nodules (Nauka, Moscow, 1986) [in Russian].
5. M. E. Mel’nikov, Deposits of Cobalt-Rich Manganese Crusts (FGUGP GNTs, Gelendzhik, 2005).