@article{1093890712, author = {Hayes, Stanley E.}, title = {Extensions of $T^0$.}, journal = {Notre Dame J. Formal Logic}, volume = {13}, number = {3}, year = {1972}, pages = { 501-505}, language = {en}, url = {http://dml.mathdoc.fr/item/1093890712} }
Hayes, Stanley E. Extensions of $T^0$.. Notre Dame J. Formal Logic, Tome 13 (1972) no. 3, pp. 501-505. http://gdmltest.u-ga.fr/item/1093890712/