ENNOLA, V. On a Theorem of erdös and Turan. MATHEMATICA SCANDINAVICA, [S. l.], v. 22, p. 75–80, 1968. DOI: 10.7146/math.scand.a-10872. Disponível em: https://www.mscand.dk/article/view/10872. Acesso em: 1 may. 2024.