@article{1093891880, author = {Seldin, Jonathan P.}, title = {Arithmetic as a study of formal systems.}, journal = {Notre Dame J. Formal Logic}, volume = {16}, number = {1}, year = {1975}, pages = { 449-464}, language = {en}, url = {http://dml.mathdoc.fr/item/1093891880} }
Seldin, Jonathan P. Arithmetic as a study of formal systems.. Notre Dame J. Formal Logic, Tome 16 (1975) no. 1, pp. 449-464. http://gdmltest.u-ga.fr/item/1093891880/