Usoltsev Vladimir А., ZUKOW, Walery and CHASOVSKIKH, Viktor P. Biomass structure of Pinus sylvestris and Betula pendula forest ecosystems in pollution gradient near copper plant on the Southern Ural. Ecological Questions. Online. 22 November 2019. Vol. 30, no. 4, pp. 49-59. [Accessed 7 July 2025]. DOI 10.12775/EQ.2019.027.