ASPLUND, E. Comparison Between Plane Symmetric Convex Bodies and Parallelograms. MATHEMATICA SCANDINAVICA, [S. l.], v. 8, p. 171–180, 1960. DOI: 10.7146/math.scand.a-10606. Disponível em: https://www.mscand.dk/article/view/10606. Acesso em: 3 may. 2024.