1. N. I. Bazilevich and A. A. Titlyanova, Biotic Cycle on the Five Continents: Nitrogen and Ash Elements in Natural Terrestrial Ecosystems (Siberian Branch, Russian Academy of Sciences, Novosibirsk, 2008) [in Russian].
2. Impact of recreational forest management on soil;V. A. Bgantsova,1987
3. L. G. Bogatyrev, “Classification of forest litters,” Pochvovedenie, No. 3, 118–127 (1990).
4. L. G. Bogatyrev, V. M. Telesnina, O. V. Semenyuk, and A. I. Benediktova, “The dynamic of the morphology and chemical properties of forest litter during natural postagrogenic reforestation and its effect on the ground cover,” Moscow Univ. Soil Sci. Bull. 75, 101–108 (2020).
5. Influence of Recreation on Forest Ecosystems and Their Components (Institute of Forest Science, Russian Academy of Sciences, Moscow, 2004) [in Russian].