Kazantseva, A. S., O. I. Kadebskaya, Y. V. Dublyansky, and V. N. Kataev. “The Study of Natural Waters of the Kolva Saddle by Hydrochemical and Isotope Methods (Perm Territory)”. Proceedings of Voronezh State University. Series: Geology, no. 1, Mar. 2022, pp. 77-89, doi:10.17308/geology.2022.1/9102.