TY  - JOUR
AU  - Rosenberg, I.G.
TI  - Special types of universal algebras preserving a relation
JO  - Portugaliae mathematica
PY  - 1975
SP  - 173
EP  - 188
VL  - 34
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1975__34_3_115261/
LA  - en
ID  - PORMA_1975__34_3_115261
ER  -