Piatnytskova, I. 2021. Memories of M. P. Ballina, M. V. Levytskoho, V. S. Nahirnoho about the cooperative movement of Ukraine in the second half of the 19th - the beginning of the 20th century. Ukrainian Peasant. 25 (Jun. 2021). DOI:https://doi.org/10.31651/2413-8142-2021-25-Piatnytskova.