1. Atlas of the Kuril Islands, Ed. by P. Ya. Baklanov, V. N. Bocharnikov, K. S. Ganzei, et al. (IPK “DIK”, Moscow–Vladivostok, 2009).
2. Yu. N. Vodyanitskii, Heavy Metals and Metalloids in Soils (Dokuchaev Soil Sci. Inst., Moscow, 2008) [in Russian].
3. D. P. Vorob’ev, Vegetation of the Kuril Islands (Akad. Nauk SSSR, Moscow–Leningrad, 1963) [in Russian].
4. V. K. Gavrilov and N. A. Solov’eva, Volcanic-Sedimentary Formations of Geoanticlinal Uplifts of the Lesser and Greater Kuriles (Nauka, Novosibirsk, 1973) [in Russian].
5. G. A. Gladkova and G. N. Butivets, “Forest volcanic soils of Kunashir Island,” Pochvovedenie, No. 2, 54–67 (1988).