%0 Journal Article
%A Korec, Ivan
%T A density estimate for the $3x+1$ problem
%J Mathematica slovaca
%D 1994
%P 85-89
%V 44
%N 1
%U http://geodesic.mathdoc.fr/item/MASLO_1994_44_1_a7/
%G en
%F MASLO_1994_44_1_a7