@article{GDZPPN001259784,
title = {Foliations induced by congruences.},
journal = {Semigroup forum},
volume = {38},
year = {1989},
pages = {365-370},
zbl = {0663.22001},
url = {http://dml.mathdoc.fr/item/GDZPPN001259784}
}
Hofmann, K.H.; Ruppert, W.A.F. Foliations induced by congruences.. Semigroup forum, Tome 38 (1989) pp. 365-370. http://gdmltest.u-ga.fr/item/GDZPPN001259784/