@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/