@article{GDZPPN00204529X,
title = {Cut-elimination for impredicative infinitary systems. Part I. Ordinal-analysis for ID1.},
journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
volume = {21},
year = {1981},
pages = {113-130},
zbl = {0484.03030},
url = {http://dml.mathdoc.fr/item/GDZPPN00204529X}
}
Pohlers, W. Cut-elimination for impredicative infinitary systems. Part I. Ordinal-analysis for ID1.. Archiv für mathematische Logik und Grundlagenforschung, Tome 21 (1981) pp. 113-130. http://gdmltest.u-ga.fr/item/GDZPPN00204529X/