@article{1183735931, author = {Robinson, Julia}, title = {An Introduction to Hyperarithmetical Functions}, journal = {J. Symbolic Logic}, volume = {32}, number = {1}, year = {1967}, pages = { 325-342}, language = {en}, url = {http://dml.mathdoc.fr/item/1183735931} }
Robinson, Julia. An Introduction to Hyperarithmetical Functions. J. Symbolic Logic, Tome 32 (1967) no. 1, pp. 325-342. http://gdmltest.u-ga.fr/item/1183735931/