@article{AMLG_1984__24_138022,
     author = {Gerhard J\"ager},
     title = {...-inaccessible ordinals, collapsing functions and a recursive notation system.},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {49--62},
     publisher = {mathdoc},
     volume = {24},
     year = {1984},
     zbl = {0545.03031},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1984__24_138022/}
}