1. B. V. Ivanov, Andesites of Kamchatka (Nauka, Moscow, 2008) [in Russian].
2. V. A. Krenev, O. A. Noskova, N. P. Dergacheva, et al., Khim. Tekhnol. 18, 105 (2007).
3. V. T. Kalinnikov and Yu. V. Rakitin, Introduction to Magnetochemistry. Method of Static Magnetic Susceptibility in Chemistry (Nauka, Moscow, 1980) [in Russian].
4. Yu. V. Rakitin and V. T. Kalinnikov, Modern Magnetochemistry (Nauka, St. Petersburg, 1994) [in Russian].
5. A. Abragam and B. Blini, Electron Paramagnetic Resonance of Transition Ions, vol. 1 (Mir, Moscow, 1972) [in Russian].