1. G. N. Baturin, Phosphorites on The Ocean Floor (Nauka, Moscow, 1978) [in Russian].
2. G. N. Baturin, Phosphate Accumulation in the Ocean (Nauka, Moscow, 2004) [in Russian].
3. G. N. Baturin and V. T. Dubinchuk, Microstructures fo Oceanic Phosphorites (Nauka, Moscow, 1979) [in Russian].
4. N. G. Brodskaya, Role of Volcanism in the Phosphorite Formation (Nauka, Moscow, 1974) [in Russian].
5. G. I. Bushinskii, “Inhibitors and Stimulators in Lithogenesis,” Litol. Polezn. Iskop., No. 4, 116–120 (1967).