@article{GDZPPN002354128, title = {On the number of prime divisors of a binomial coefficient.}, journal = {Mathematica Scandinavica}, volume = {38}, year = {1976}, pages = {271-281}, zbl = {0344.10003}, url = {http://dml.mathdoc.fr/item/GDZPPN002354128} }
Selmer, Ernst S. On the number of prime divisors of a binomial coefficient.. Mathematica Scandinavica, Tome 38 (1976) pp. 271-281. http://gdmltest.u-ga.fr/item/GDZPPN002354128/