Carnielli, Walter. “Ernst Schröder, ‘Parafrasi Schröderiane. Ovvero: Ernst Schröder, Leoperazioni Del Calcolo Logico’”. Logic and Logical Philosophy 20, no. 3 (November 30, 2011): 267–272. Accessed July 4, 2025. https://apcz.umk.pl/LLP/article/view/LLP.2011.016.