TY  - JOUR
AU  - Abrhan, Imrich
AU  - Satko, Ladislav
TI  - $r$-systems of unary algebras. II: Maximal and minimal subalgebras of the direct products of unary algebras
JO  - Mathematica slovaca
PY  - 1994
SP  - 69
EP  - 83
VL  - 44
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MASLO_1994__44_1_a6/
LA  - en
ID  - MASLO_1994__44_1_a6
ER  -