@article{GDZPPN001254804,
title = {Which semilattice indecomposables are groups?},
journal = {Semigroup forum},
volume = {23},
year = {1981},
pages = {243-246},
zbl = {0466.20039},
url = {http://dml.mathdoc.fr/item/GDZPPN001254804}
}
Nordahl, T.E.; Scheiblich, H.E. Which semilattice indecomposables are groups?. Semigroup forum, Tome 23 (1981) pp. 243-246. http://gdmltest.u-ga.fr/item/GDZPPN001254804/