@article{1183742928, author = {Hajek, Petr and Kucera, Antonin}, title = {On Recursion Theory in $I\sum\_1$}, journal = {J. Symbolic Logic}, volume = {54}, number = {1}, year = {1989}, pages = { 576-589}, language = {en}, url = {http://dml.mathdoc.fr/item/1183742928} }
Hajek, Petr; Kucera, Antonin. On Recursion Theory in $I\sum_1$. J. Symbolic Logic, Tome 54 (1989) no. 1, pp. 576-589. http://gdmltest.u-ga.fr/item/1183742928/