1. U. I. Abaikhanov and V. G. Popov, “Genesis of carbonaceous ferruginous and ferruginous boric waters of the Central Caucasus and Pre-Caucasus (within the territory of the Karachay-Cherkess Republic).),” Geologiya, Geograf. Global. Energ. 2, 175–177 (2011).
2. L. I. Auzina, O. T. Zverev, G. S. Lonshakov, and T. S. Andreeva, “Khongor-Uula mineral waters, Republic of Buryatia,” Geology, Search and Prospecting of Mienral Resources and Methods of Geological Studies: Proc. All-Russian Scientific-Technical Conference with International Participation “Geonauka-2014”: Actual Problems of Interior Study (IrGTU, Irkutsk, 2014), pp. 102–108 [in Russian].
3. M. Bau, “Rare-earth element mobility during hydrothermal and metamorphic fluid-rock interaction and the significance of the oxidation state of europium,” Chem. Geol. 93 (3-4), 219–230 (1991). https://doi.org/10.1016/0009-2541(91)90115-8
4. I. M. Borisenko and L. V. Zamana, Mineral Waters of the Buryat ASSR (Buryat. kn. izd-vo,, Ulan-Ude, 1978) [in Russian].
5. E. P. Chebykin, L. M. Sorokovikova, I. V. Tomberg, E. N. Vodneva, S. V. Rasskazov, T. V. Khodzher, and M. A. Grachev, “Current status of the Selenga River waters in Russia in terms of main components and trace elements,” Khim. Interesakh Ust. Razv. 20 (5), 613–631 (2012).