RICHARDS, Ted. The Difficulties of a Hartmanesque Value Calculus. Journal of Formal Axiology: Theory and Practice, [S. l.], v. 3, p. 105–114, 2010. DOI: 10.67945/jfa.v3i.84. Disponível em: https://journal.hartmaninstitute.org/index.php/jfa/article/view/84. Acesso em: 13 nov. 2026.