´ ARPÁD SZÁZ. A relational reformulation of the Phelps–Cardwell lemma. Malaya Journal of Matematik, India, v. 2, n. 03, p. 254–262, 2014. DOI: 10.26637/mjm203/011. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/415. Acesso em: 22 nov. 2024.