George Boolos. Extremely Undecidable Sentences. Journal of Symbolic Logic, 47(1):191-196, 1982.
@article{Boolos82,
title = {Extremely Undecidable Sentences},
author = {George Boolos},
year = {1982},
researchr = {https://researchr.org/publication/Boolos82},
cites = {0},
citedby = {0},
journal = {Journal of Symbolic Logic},
volume = {47},
number = {1},
pages = {191-196},
}