TY  - JOUR
AU  - Vopěnka, Petr
TI  - Concerning a proof of $\aleph_{\alpha+1}\leq 2^{\aleph_\alpha}$ without axiom of choice
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1965
SP  - 111
EP  - 113
VL  - 06
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1965__6_1_a12/
LA  - en
ID  - CMUC_1965__6_1_a12
ER  -