@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/