@article{1183737760, author = {Parikh, Rohit}, title = {Existence and Feasibility in Arithmetic}, journal = {J. Symbolic Logic}, volume = {36}, number = {1}, year = {1971}, pages = { 494-508}, language = {en}, url = {http://dml.mathdoc.fr/item/1183737760} }
Parikh, Rohit. Existence and Feasibility in Arithmetic. J. Symbolic Logic, Tome 36 (1971) no. 1, pp. 494-508. http://gdmltest.u-ga.fr/item/1183737760/