VOGEL, Ulrich. Exploring the Hartman Archives. Journal of Formal Axiology: Theory and Practice, [S. l.], v. 6, p. 7–14, 2013. DOI: 10.67945/jfa.v6i.111. Disponível em: https://journal.hartmaninstitute.org/index.php/jfa/article/view/111. Acesso em: 13 nov. 2026.