%0 Journal Article
%A Ekkehard Krätzel
%T The distribution of powerful integers of type 4
%J Acta Arithmetica
%D 1989
%P 141-145
%V 52
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/aa-52-2-141-145/
%R 10.4064/aa-52-2-141-145
%G en
%F 10_4064_aa_52_2_141_145