SELMER, Ernst S. On the number of prime divisors of a binomial coefficient. MATHEMATICA SCANDINAVICA, [S. l.], v. 39, p. 271–281, 1976. DOI: 10.7146/math.scand.a-11662. Disponível em: https://tidsskrift.dk/math/article/view/11662. Acesso em: 14 aug. 2026.