%0 Journal Article
%A Tang, Min
%T Relatively prime sets and a phi function for subsets of $\{1, 2,\dots, n\}$
%J Journal of integer sequences
%D 2010
%V 13
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JIS_2010__13_7_a3/
%G en
%F JIS_2010__13_7_a3