TY  - JOUR
AU  - Čihák, Pavel
TI  - A combinatorial theorem on the existence of a separating element and its applications to sequences and $\sigma$-derivations of measures
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1969
SP  - 593
EP  - 611
VL  - 10
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1969__10_4_a5/
LA  - en
ID  - CMUC_1969__10_4_a5
ER  -