“Selenium Content in Environmental Objects and in the Hair of the Population in the Territory of the Oktyabrsky District of the Khanty-Mansi Autonomous Okrug - Yugra”. 2025. Proceedings of Voronezh State University. Series: Geography. Geoecology, no. 3 (September): 157-62. https://doi.org/10.17308/geo/1609-0683/2025/3/157-162.