Rogalski, Andrzej. “A PAGE IN THE POLISH HISTORY OF LOGIC: JAN ŁUKASIEWICZ AND JAN SALAMUCHA”. Scientific Journal of Polonia University 9, no. 2 (April 8, 2014): 13-21. Accessed November 22, 2024. http://pnap.ap.edu.pl/index.php/pnap/article/view/20.