BRONDSTED, A. Convexification of conjugate functions. MATHEMATICA SCANDINAVICA, [S. l.], v. 36, p. 131–136, 1975. DOI: 10.7146/math.scand.a-11567. Disponível em: https://www.mscand.dk/article/view/11567. Acesso em: 4 may. 2024.