@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/