%0 Journal Article
%A P. Erdös
%T On the Integers Relatively Prime to n and a Number-Theoretic Function Considered by Jacobsthal.
%J Mathematica Scandinavica
%D 1962
%P 163-170
%V 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1962__10_165799/
%F MS2_1962__10_165799