SAWICKI, K. F. Filozofja egzystencjalna. Studies in the History of Philosophy, [S. l.], v. 1, n. 1, p. 67–79, 2010. DOI: 10.12775/szhf.2010.004. Disponível em: https://apcz.umk.pl/szhf/article/view/szhf.2010.004. Acesso em: 4 dec. 2021.