@article{GDZPPN002045079,
title = {A version of the ...1-reflection principle for CFA provable in PRA.},
journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
volume = {20},
year = {1980},
pages = {27-40},
zbl = {0429.03040},
url = {http://dml.mathdoc.fr/item/GDZPPN002045079}
}
Päppinghaus, Peter. A version of the ...1-reflection principle for CFA provable in PRA.. Archiv für mathematische Logik und Grundlagenforschung, Tome 20 (1980) pp. 27-40. http://gdmltest.u-ga.fr/item/GDZPPN002045079/