ISRAEL, R. B.; PHELPS, R. R. Some convexity questions arising in statistical mechanics. MATHEMATICA SCANDINAVICA, [S. l.], v. 54, p. 133–156, 1984. DOI: 10.7146/math.scand.a-12048. Disponível em: https://www.mscand.dk/article/view/12048. Acesso em: 28 apr. 2024.