Ciechanowski, Jan Stanisław. “Poles in the International Brigades During the Spanish Civil War (1936–1939). A Few Remarks on the State of Research and Prospects for Further Study”. Res Gestae. Historical Journal 10 (July 27, 2020): 72–83. Accessed November 8, 2026. https://resgestae.uken.krakow.pl/article/view/7297.