@article{GDZPPN002485559,
title = {Equivalence Systems with Finitely Many Relations.},
journal = {Monatshefte f\"ur Mathematik},
volume = {104},
year = {1987},
pages = {77-84},
zbl = {0606.08002},
url = {http://dml.mathdoc.fr/item/GDZPPN002485559}
}
Behrendt, Gerhard. Equivalence Systems with Finitely Many Relations.. Monatshefte für Mathematik, Tome 104 (1987) pp. 77-84. http://gdmltest.u-ga.fr/item/GDZPPN002485559/