RAYMOND, Jean Saint. Fonctions convexes de première classe. MATHEMATICA SCANDINAVICA, [S. l.], v. 54, p. 121–129, 1984. DOI: 10.7146/math.scand.a-12046. Disponível em: https://tidsskrift.dk/math/article/view/12046. Acesso em: 14 aug. 2026.