@article{GDZPPN001250299,
title = {Fastideale von Halbgruppen.},
journal = {Semigroup forum},
volume = {7},
year = {1974},
pages = {261-270},
url = {http://dml.mathdoc.fr/item/GDZPPN001250299}
}
Jürgensen, H. Fastideale von Halbgruppen.. Semigroup forum, Tome 7 (1974) pp. 261-270. http://gdmltest.u-ga.fr/item/GDZPPN001250299/