@article{GDZPPN00240589X,
title = {Congruence Relations and Functional Completeness in Universal Algebras; Structure Theory of Hemi-Primals, I.},
journal = {Mathematische Zeitschrift},
volume = {114},
year = {1970},
pages = {293-308},
zbl = {0181.02301},
url = {http://dml.mathdoc.fr/item/GDZPPN00240589X}
}
Foster, Alfred L. Congruence Relations and Functional Completeness in Universal Algebras; Structure Theory of Hemi-Primals, I.. Mathematische Zeitschrift, Tome 114 (1970) pp. 293-308. http://gdmltest.u-ga.fr/item/GDZPPN00240589X/