%0 Journal Article %A J. Sander %T On the (3N+1)-conjecture %J Acta Arithmetica %D 1990 %P 241-248 %V 55 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-55-3-241-248/ %R 10.4064/aa-55-3-241-248 %G en %F 10_4064_aa_55_3_241_248