Kovalets, T. “«Lithuania With the Crown Has a Common cause…»: The Siege of Gomel by the Cossacks and the Cossack-Lithuanian Negotiations in June 1651 on the Basis of Little-Known Documents (publication of Sources)”. History Journal of Yuriy Fedkovych Chernivtsi National University, no. 53, June 2021, pp. 151-8, doi:10.31861/hj2021.53.151-158.