SELMER, E. 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://www.mscand.dk/article/view/11662. Acesso em: 24 apr. 2024.