%0 Journal Article
%A Mohand-Ouamar Hernane
%A Florian Luca
%T On the independence of $\sigma (\phi (n))$ and $\phi (\sigma (n))$
%J Acta Arithmetica
%D 2009
%P 337-346
%V 138
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/aa138-4-4/
%R 10.4064/aa138-4-4
%G en
%F 10_4064_aa138_4_4