@article{bwmeta1.element.bwnjournal-article-fmv118i1p2bwm,
author = {Zofia Adamowicz},
title = {Perfect set theorems for $$\Pi$^1\_2$ in the universe without choice},
journal = {Fundamenta Mathematicae},
volume = {115},
year = {1983},
pages = {11-31},
zbl = {0537.03031},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv118i1p2bwm}
}
Adamowicz, Zofia. Perfect set theorems for $Π^1_2$ in the universe without choice. Fundamenta Mathematicae, Tome 115 (1983) pp. 11-31. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv118i1p2bwm/