@article{1183742020,
author = {John, Thomas},
title = {Recursion in Kolmogorov's $R$-Operator and the Ordinal $\sigma\_3$},
journal = {J. Symbolic Logic},
volume = {51},
number = {1},
year = {1986},
pages = { 1-11},
language = {en},
url = {http://dml.mathdoc.fr/item/1183742020}
}
John, Thomas. Recursion in Kolmogorov's $R$-Operator and the Ordinal $\sigma_3$. J. Symbolic Logic, Tome 51 (1986) no. 1, pp. 1-11. http://gdmltest.u-ga.fr/item/1183742020/