TY  - JOUR
TI  - Journal for the Cultivation of Mathematics. Abstracts
JO  - Czechoslovak Mathematical Journal
PY  - 1957
SP  - 159
EP  - 164
VL  - 07
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1957.100239/
DO  - 10.21136/CMJ.1957.100239
LA  - en
ID  - 10_21136_CMJ_1957_100239
ER  -