Farenii, Ihor. “The Concept of ‘Democratic, Peasant-Bourgeois-Cossack Revolution in 1648–1649’ of Academician Pokrovskyi”. Scientific Papers of the Vinnytsia Mykhailo Kotsyiubynskyi State Pedagogical University Series History, no. 39, Apr. 2022, pp. 81-89, https://doi.org/10.31652/2411-2143-2022-39-81-89.