TY  - JOUR
AU  - T. Kreid
TI  - Combinatorial operators
JO  - Commentationes Mathematicae
PY  - 1990
SP  -  243
EP  - 249
VL  - 29
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.14708/cm.v29i2.6276/
DO  - 10.14708/cm.v29i2.6276
LA  - pl
ID  - 10_14708_cm_v29i2_6276
ER  -