TY  - JOUR
AU  - Alfred L. Foster
TI  - Congruence Relations and Functional Completeness in Universal Algebras; Structure Theory of Hemi-Primals, I.
JO  - Mathematische Zeitschrift
PY  - 1970
SP  - 293
EP  - 308
VL  - 113
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1970__113_171277/
ID  - MZ_1970__113_171277
ER  -