@article{1183743040, author = {Krajicek, Jan and Pudlak, Pavel}, title = {Propositional Proof Systems, the Consistency of First Order Theories and the Complexity of Computations}, journal = {J. Symbolic Logic}, volume = {54}, number = {1}, year = {1989}, pages = { 1063-1079}, language = {en}, url = {http://dml.mathdoc.fr/item/1183743040} }
Krajicek, Jan; Pudlak, Pavel. Propositional Proof Systems, the Consistency of First Order Theories and the Complexity of Computations. J. Symbolic Logic, Tome 54 (1989) no. 1, pp. 1063-1079. http://gdmltest.u-ga.fr/item/1183743040/