%0 Journal Article
%A Günther Wirsching
%T An improved estimate concerning 3n+1 predecessor sets
%J Acta Arithmetica
%D 1993
%P 205-210
%V 63
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/aa-63-3-205-210/
%R 10.4064/aa-63-3-205-210
%G en
%F 10_4064_aa_63_3_205_210