TY  - JOUR
AU  - A. Geroldinger
AU  - G. Lettl
TI  - Factorization problems in semigroups.
JO  - Semigroup forum
PY  - 1990
SP  - 23
EP  - 38
VL  - 40
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1990__40_1_135002/
ID  - SF_1990__40_1_135002
ER  -