RAYMOND, Jean Saint. Fonctions convexes de première classe. Mathematica Scandinavica, Berkeley, CA, United States, v. 54, p. 121–129, 1984. DOI: 10.7146/math.scand.a-12046. Disponível em: https://journals.msp.org/mscand/article/view/1581. Acesso em: 25 jul. 2026.