KILPELÄINEN, T. Convex increasing functions preserve the sub-F-extremality. Annales Fennici Mathematici, [S. l.], v. 12, n. 1, p. 55–60, 1987. DOI: 10.5186/aasfm.1987.1216. Disponível em: https://afm.journal.fi/article/view/134583. Acesso em: 25 nov. 2024.