TY  - JOUR
AU  - Tkachuk, Vladimir V.
TI  - Some non-multiplicative properties are $l$-invariant
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1997
SP  - 169
EP  - 175
VL  - 38
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1997__38_1_a15/
LA  - en
ID  - CMUC_1997__38_1_a15
ER  -