Kulagin, A. Y., G. A. Zaitsev, and R. K. Giniyatullin. “Reforestation of Brown Coal Dumps in Bashkortostan: Characteristics of the Soil and the Condition of Birch (Betula Pendula Roth) Stands (Results of a 35-Year Experiment)”. KnE Life Sciences, Vol. 4, no. 7, Oct. 2018, pp. 104–109, doi:10.18502/kls.v4i7.3227.