1. Anufriev G.S. and Boltenkov B.S. Ferromanganese Nodules of the Baltic Sea: Composition, Helium Isotopes, and Growth Rate, Lithol. Polezn. Iskop., 2007, vol. 42, no. 3, pp. 267–272 [Lith. Mineral. Res. (Engl. Transl.) 2007, vol. 42, no. 3, pp. 240–245].
2. Atlas morfologicheskikh tipov zhelezomargantsevych konkretsii mirovogo okeana (Atlas of Morphological Types of Ferromanganese Nodules in the World Ocean), Egiazarov, B.Kh. and Zyka, B., Eds., Brno: Geofizika, 1990.
3. Allen, J.A., Manganese Deposition on the Shells of Living Mollusks, Nature, 1960, vol. 185, pp. 336–340.
4. Baturin, G.N., Geokhimiya zhelezomargantsevykh konkretsii okeana (Geochemistry of Oceanic Ferromanganese Nodules), Moscow: Nauka, 1986.
5. Baturin, G.N., Behavior of Transitional Metals in Interstitial Water of Sediments of the Baltic Sea, Litol. Polezn. Iskop., 1991, vol. 26, no. 5, pp. 32–41.