@article{GDZPPN002486415,
title = {Subsemigroups of Finitely Generated Groups with Divisor-Theory.},
journal = {Monatshefte f\"ur Mathematik},
volume = {105},
year = {1988},
pages = {205-210},
zbl = {0671.20059},
url = {http://dml.mathdoc.fr/item/GDZPPN002486415}
}
Lettl, Günter. Subsemigroups of Finitely Generated Groups with Divisor-Theory.. Monatshefte für Mathematik, Tome 105 (1988) pp. 205-210. http://gdmltest.u-ga.fr/item/GDZPPN002486415/