Usoltsev V. А., Piernik, A., Osmirko, A. A., Tsepordey, I. S., Chasovskikh, V. P. and Zukow, W. (2019) “Forest stand biomass of Picea spp.: an additive model that may be related to climate and civilisational changes”, Bulletin of Geography. Socio-economic Series, 45(45), pp. 133–147. doi: 10.2478/bog-2019-0029.