Pietrzak, Jacek. “The Mission of Wojciech Stpiczyński to Upper Silesia. A Chapter From The Activity of Piisudski’s Political Camp in the Period of the Uprisings and Plebiscite (1920-1921) ”. Acta Universitatis Lodziensis. Folia Historica, no. 66 (January 1, 1999): 87–118. Accessed December 7, 2025. https://czasopisma.uni.lodz.pl/historica/article/view/21050.