Comparative analysis of soil ecosystems of protected and artificially created beech forests von Tsarenko, P.M., Zaimenko, N.V., Demchenko, E.M., Mikhailyuk, T.I., Didyk, N.P., Ellanska, N.E., Kharitonova, I.P., Benderychek, T.Yu., Melnyk, V.I.