@article{1183740952,
author = {Boolos, George},
title = {Extremely Undecidable Sentences},
journal = {J. Symbolic Logic},
volume = {47},
number = {1},
year = {1982},
pages = { 191-196},
language = {en},
url = {http://dml.mathdoc.fr/item/1183740952}
}
Boolos, George. Extremely Undecidable Sentences. J. Symbolic Logic, Tome 47 (1982) no. 1, pp. 191-196. http://gdmltest.u-ga.fr/item/1183740952/