@article{1093891297,
author = {Szabo, Manfred E.},
title = {A categorical equivalence of proofs.},
journal = {Notre Dame J. Formal Logic},
volume = {15},
number = {1},
year = {1974},
pages = { 177-191},
language = {en},
url = {http://dml.mathdoc.fr/item/1093891297}
}
Szabo, Manfred E. A categorical equivalence of proofs.. Notre Dame J. Formal Logic, Tome 15 (1974) no. 1, pp. 177-191. http://gdmltest.u-ga.fr/item/1093891297/