Gavrilenkov, A. The System of Concentration Camps in the Cities of the Smolensk Province During the Soviet-Polish War of 1919–1921. In City and War; Grabarczyk, T., Pogońska-Pol, M., Eds.; , Series Ed.; Faces of war; Lodz University Press: Poland, 2021; Vol. 4, pp. 219-232. https://doi.org/10.18778/8220-617-3.12.