TY  - JOUR
AU  - Šulka, Robert
TI  - On three lattices that belong to every semigroup
JO  - Mathematica slovaca
PY  - 1984
SP  - 217
EP  - 228
VL  - 34
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MASLO_1984__34_2_a10/
LA  - en
ID  - MASLO_1984__34_2_a10
ER  -