@article{GDZPPN002348934,
title = {On the Concept of Congruence Relation in Partial Algebras.},
journal = {Mathematica Scandinavica},
volume = {20},
year = {1967},
pages = {275-280},
zbl = {0175.28801},
url = {http://dml.mathdoc.fr/item/GDZPPN002348934}
}
Grätzer, G.; Wenzel, G.H. On the Concept of Congruence Relation in Partial Algebras.. Mathematica Scandinavica, Tome 20 (1967) pp. 275-280. http://gdmltest.u-ga.fr/item/GDZPPN002348934/