%0 Journal Article
%A A. Geroldinger
%A G. Lettl
%T Factorization problems in semigroups.
%J Semigroup forum
%D 1990
%P 23-38
%V 40
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1990__40_1_135002/
%F SF_1990__40_1_135002