%0 Journal Article
%A Jean-Marie De Koninck
%A Florian Luca
%T On the composition of
 the Euler function and the sum of divisors function
%J Colloquium Mathematicum
%D 2007
%P 31-51
%V 108
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm108-1-4/
%R 10.4064/cm108-1-4
%G en
%F 10_4064_cm108_1_4