Kovalets, T. 2022. «Such army Poland has not had yet»: Little-known documents from the battle of Berestechko of 1651 (publication of historical sources). History Journal of Yuriy Fedkovych Chernivtsi National University. 55 (Jun. 2022), 155-164. DOI:https://doi.org/10.31861/hj2022.55.155-164.