@article{1183744044,
author = {Montagna, Franco},
title = {Polynomially and Superexponentially Shorter Proofs in Fragments of Arithmetic},
journal = {J. Symbolic Logic},
volume = {57},
number = {1},
year = {1992},
pages = { 844-863},
language = {en},
url = {http://dml.mathdoc.fr/item/1183744044}
}
Montagna, Franco. Polynomially and Superexponentially Shorter Proofs in Fragments of Arithmetic. J. Symbolic Logic, Tome 57 (1992) no. 1, pp. 844-863. http://gdmltest.u-ga.fr/item/1183744044/