@article{JRAM_1989__396_153129,
     author = {Herbert S. Wilf and Donald E. Knuth},
     title = {The power of a prime that divides a generalized binomial coefficient.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {212--219},
     publisher = {mathdoc},
     volume = {396},
     year = {1989},
     zbl = {0657.10008},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1989__396_153129/}
}