@article{1181154880,
author = {Urquhart, Alasdair},
title = {The Complexity of Propositional Proofs},
journal = {Bull. Symbolic Logic},
volume = {1},
number = {1},
year = {1995},
pages = { 425-467},
language = {en},
url = {http://dml.mathdoc.fr/item/1181154880}
}
Urquhart, Alasdair. The Complexity of Propositional Proofs. Bull. Symbolic Logic, Tome 1 (1995) no. 1, pp. 425-467. http://gdmltest.u-ga.fr/item/1181154880/