@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/