%0 Journal Article
%A Helmut Maier
%A Carl Pomerance
%T On the number of distinct values of Euler's φ-function
%J Acta Arithmetica
%D 1987
%P 263-275
%V 49
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/aa-49-3-263-275/
%R 10.4064/aa-49-3-263-275
%G en
%F 10_4064_aa_49_3_263_275