@article{bwmeta1.element.bwnjournal-article-fmv43i2p166bwm,
author = {Andrzej Grzegorczyk},
title = {Some proofs of undecidability of arithmetic},
journal = {Fundamenta Mathematicae},
volume = {43},
year = {1956},
pages = {166-177},
zbl = {0072.00502},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv43i2p166bwm}
}
Grzegorczyk, Andrzej. Some proofs of undecidability of arithmetic. Fundamenta Mathematicae, Tome 43 (1956) pp. 166-177. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv43i2p166bwm/