Kaczmarek, Janusz. “On the Use of Formal Tools and Structures in Philosophy. Formal Ontology and Topological Ontology”. Studia Philosophiae Christianae 55, no. 2 (June 30, 2019): 103–124. Accessed May 18, 2024. https://www.czasopisma.uksw.edu.pl/index.php/spch/article/view/6339.