Belkin, Vladimir V., Fyodor V. Fyodorov, Aleksandr M. Rykov, and Viktor A. Ilyukha. “Phenological Observations on Protected Natural Areas Associated With Brown Bear (Ursus Arctos L.) Ecology”. Baltic Forestry 27, no. 2 (January 31, 2022). Accessed April 30, 2024. https://balticforestryojs.lammc.lt/ojs/index.php/BF/article/view/618.