Kucherov, Hennadii, et al. “Rural «Prosvity» of the Right Bank Ukraine: Statistical Analysis (1920–1922s)”. Scientific Papers of the Vinnytsia Mykhailo Kotsyiubynskyi State Pedagogical University Series History, no. 38, Jan. 2022, pp. 39-47, https://doi.org/10.31652/2411-2143-2021-38-39-47.