%0 Journal Article
%A Florian Luca
%A Carl Pomerance
%T Acknowledgment of priority: “On some problems of Mąkowski–Schinzel and Erdős concerning the arithmetical functions $\phi$ and $\sigma$”  (Colloq. Math. 92 (2002), 111–130)
%J Colloquium Mathematicum
%D 2012
%P 139-139
%V 126
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm126-1-10/
%R 10.4064/cm126-1-10
%G en
%F 10_4064_cm126_1_10