TVERBERG, H. On two Inequalities by S. Selberg. MATHEMATICA SCANDINAVICA, [S. l.], v. 6, p. 308–310, 1958. DOI: 10.7146/math.scand.a-10557. Disponível em: https://www.mscand.dk/article/view/10557. Acesso em: 11 apr. 2025.