%0 Journal Article %A William A. Webb %T The number of binomial coefficients in residue classes modulo p and $p^2$. %J Colloquium Mathematicum %D 1990 %P 275-280 %V 60 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-60-61-1-275-280/ %R 10.4064/cm-60-61-1-275-280 %G en %F 10_4064_cm_60_61_1_275_280