@article{1183745529,
author = {Takeuti, Gaisi},
title = {Frege Proof System and TNC$^\circ$},
journal = {J. Symbolic Logic},
volume = {63},
number = {1},
year = {1998},
pages = { 709-738},
language = {en},
url = {http://dml.mathdoc.fr/item/1183745529}
}
Takeuti, Gaisi. Frege Proof System and TNC$^\circ$. J. Symbolic Logic, Tome 63 (1998) no. 1, pp. 709-738. http://gdmltest.u-ga.fr/item/1183745529/