@article{GDZPPN002045877,
title = {K\"onig's Lemma, the ...-rule and primitive recursive arithmetic.},
journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
volume = {25},
year = {1985},
pages = {67-74},
zbl = {0594.03036},
url = {http://dml.mathdoc.fr/item/GDZPPN002045877}
}
López-Escobar, E.G.K. König's Lemma, the ...-rule and primitive recursive arithmetic.. Archiv für mathematische Logik und Grundlagenforschung, Tome 25 (1985) pp. 67-74. http://gdmltest.u-ga.fr/item/GDZPPN002045877/