TY  - JOUR
AU  - Zofia Adamowicz
TI  - Perfect set theorems for $Π^1_2$ in the universe without choice
JO  - Fundamenta Mathematicae
PY  - 1983
SP  - 11
EP  - 31
VL  - 118
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-118-1-11-31/
DO  - 10.4064/fm-118-1-11-31
LA  - en
ID  - 10_4064_fm_118_1_11_31
ER  -