SKOVGAARD, H. On inequalities of the Turán type. MATHEMATICA SCANDINAVICA, [S. l.], v. 2, p. 65–73, 1954. DOI: 10.7146/math.scand.a-10396. Disponível em: https://www.mscand.dk/article/view/10396. Acesso em: 28 apr. 2024.