%0 Journal Article
%A Kevin Ford
%T The number of solutions of \(\varphi (x)=m\)
%J Annals of mathematics
%D 1999
%V 150
%N 1
%U http://geodesic.mathdoc.fr/articles/10.2307/121103/
%R 10.2307/121103
%F 10_2307_121103