TY  - JOUR
AU  - Charvát, František
TI  - On problems concerning extension of linear operations on linear spaces
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1971
SP  - 105
EP  - 115
VL  - 12
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1971__12_1_a11/
LA  - en
ID  - CMUC_1971__12_1_a11
ER  -