Ivanov, V., and A. Chichulin, “DOCUMENTARY SOURCES OF SOVIET STATE ADMINISTRATION IN THE FIELD OF COOPERATION IN 1918-1931: RETROSPECTIVE ANALYSIS”, Статьи, The Bulletin of the Volga Region Institute of Administration, 23/2 (2023), 54-66, https://doi.org/10.22394/1682-2358-2023-2-54-66.