GOLOMB, Solomon W. Sets of primes with intermediate density. MATHEMATICA SCANDINAVICA, [S. l.], v. 3, p. 264–274, 1955. DOI: 10.7146/math.scand.a-10445. Disponível em: https://tidsskrift.dk/math/article/view/10445. Acesso em: 14 aug. 2026.