BUSEMANN, H.; PETTY, C. M. Problems on convex bodies. MATHEMATICA SCANDINAVICA, [S. l.], v. 4, p. 88–94, 1956. DOI: 10.7146/math.scand.a-10457. Disponível em: https://www.mscand.dk/article/view/10457. Acesso em: 6 may. 2024.