1. Betti, A. (2005). Stanisław Leśniewski - life. The Polish Philosophy Webpage,
http://www.fmag.unict.it/
polphil/PolHome.html
2. Betti, A. (2004b). Łukasiewicz and Leśniewski on contradiction. Reports on Philosophy, 22, 247–271.
3. Cohen, J. (1965). Review: The Logical Systems of Leśniewski by E. Luschei. The Philosophical Quarterly, 15(58), 81–82.
4. Dawson, E. (1965). Review: The Logical Systems of Leśniewski by E. Luschei. The British Journal for the Philosophy of Science, 15(60), 341–345.
5. Gessler, N. (2007). Introduction à l’oeuvre de S. Lesniewski. Fascicule V - Lesniewski, lecteur de Frege. Neuchâtel: Centre de Recherches Sémiologique.