@article{1093894374, author = {Sanchis, Luis E.}, title = {A generalization of the Gentzen Hauptsatz.}, journal = {Notre Dame J. Formal Logic}, volume = {12}, number = {1}, year = {1971}, pages = { 499-504}, language = {en}, url = {http://dml.mathdoc.fr/item/1093894374} }
Sanchis, Luis E. A generalization of the Gentzen Hauptsatz.. Notre Dame J. Formal Logic, Tome 12 (1971) no. 1, pp. 499-504. http://gdmltest.u-ga.fr/item/1093894374/