1. M. I. Akimenko, L. N. Kogarko, N. V. Sorokhtina, N. N. Kononkova, and V. P. Mamontov, “A new occurrence of alkaline magmatism on the Kola Peninsula: an agpaitic dyke in the Kandalaksha Region,” Dokl. Earth Sci. 458 (1), 1125–1128 (2014).
2. O. A. Alekin, Principles of Hydrochemistry (Gidrometeoizdat, Leningrad, 1970) [in Russian].
3. J. M. Besser, W. G. Brumbaugh, C. D. Ivey, C. G. Ingersoll, and P. W. Moran, “Biological and chemical characterization of metal bioavailability in sediments from Lake Roosevelt, Columbia River, Washington, USA,” Archives of Environmental Contamination and Toxicology 54 (4), 557–570 (2007).
4. A. Henriksen, B. L. Skjelvåle, J. Mannio, A. Wilander, R. Harriman, C. Curtis, J. P. Jensen, and T. I. Moiseenko, “Northern European Lake Survey (1995), Finland, Norway, Sweden, Denmark, Russian Kola, Russian Karelia, Scotland and Wales,” Ambio 27 (2), 80–91 (1998).
5. A. Henriksen, I. Kämäri, M. Posh, and A. Wilander, “Critical loads of acidity: Nordic surface waters,” Ambio 21, 356–363 (1992).