@article{10_4064_cm_60_61_1_275_280,
     author = {William A. Webb},
     title = {The number of binomial coefficients in residue classes modulo p and $p^2$.},
     journal = {Colloquium Mathematicum},
     pages = {275--280},
     publisher = {mathdoc},
     volume = {60},
     number = {1},
     year = {1990},
     doi = {10.4064/cm-60-61-1-275-280},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-60-61-1-275-280/}
}