@article{AMLG_1980__20_137958,
     author = {Peter P\"appinghaus},
     title = {A version of the ...1-reflection principle for {CFA} provable in {PRA.}},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {27--40},
     publisher = {mathdoc},
     volume = {20},
     year = {1980},
     zbl = {0429.03040},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1980__20_137958/}
}