@article{bwmeta1.element.bwnjournal-article-fmv38i1p13,
author = {Andrzej Grzegorczyk},
title = {Undecidability of Some Topological Theories},
journal = {Fundamenta Mathematicae},
volume = {38},
year = {1951},
pages = {137-152},
zbl = {0045.00301},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv38i1p13}
}
Grzegorczyk, Andrzej. Undecidability of Some Topological Theories. Fundamenta Mathematicae, Tome 38 (1951) pp. 137-152. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv38i1p13/