@article{1183731603,
author = {McNaughton, Robert},
title = {Some Formal Relative Consistency Proofs},
journal = {J. Symbolic Logic},
volume = {18},
number = {1},
year = {1953},
pages = { 136-144},
language = {en},
url = {http://dml.mathdoc.fr/item/1183731603}
}
McNaughton, Robert. Some Formal Relative Consistency Proofs. J. Symbolic Logic, Tome 18 (1953) no. 1, pp. 136-144. http://gdmltest.u-ga.fr/item/1183731603/