@article{AMLG_1964__7_137768,
     author = {Wilhelm Ackermann},
     title = {Der {Aufbau} einer h\"oheren {Logik.}},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {5--22},
     publisher = {mathdoc},
     volume = {7},
     year = {1964},
     zbl = {0154.25503},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1964__7_137768/}
}