Zuziak, Władysław. “Jean-Paul Sartre and Louis Lavelle – Two Existential Conceptions of Humanism and Their Ethical Consequences”. Kwartalnik Naukowy Fides et Ratio 48, no. 4 (December 30, 2021): 91–102. Accessed January 30, 2026. https://fidesetratio.com.pl/ojs/index.php/FetR/article/view/977.