1. V. Ya. Levin, Alcaline Province of the Ilmeny-Vishnevye Mountains (Nauka. UNTs AN SSSR, Moscow, 1974) [in Russian].
2. V. Ya. Levin, B. M. Ronenson, V. S. Samkov, et al., Alcaline-Carbonatite Complexes of the Urals (Uralgeolkom, Yekaterinburg, 1997) [in Russian].
3. I. S. Williams, Rev. Econ. Geol. 7, 1 (1998).
4. O. A. Bogatikov, L. V. Kosarev, and E. V. Sharkov, Average Chemical Compositions of Igneous Rocks (Nedra, Moscow, 1987) [in Russian].
5. A. A. Krasnobaev, A. I. Rusin, S. V. Busharina, et al., Dokl. Earth Sci. 434, 1226 (2010).