SKOLEM, T. On certain distributions of integers in pairs with given differences. MATHEMATICA SCANDINAVICA, [S. l.], v. 5, p. 57–68, 1957. DOI: 10.7146/math.scand.a-10490. Disponível em: https://www.mscand.dk/article/view/10490. Acesso em: 19 apr. 2024.