TY  - JOUR
TI  - [unknown]
JO  - Acta mathematica Universitatis Comenianae
PY  - 1985
SP  - 217
EP  - 224
VL  - 46-47
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AMUC_1985__46-47_185919/
ID  - AMUC_1985__46-47_185919
ER  -