@article{AMLG_1985__25_138041,
     author = {Peter Clote},
     title = {Optimal bounds for ordinal comparison maps.},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {99--108},
     year = {1985},
     volume = {25},
     zbl = {0602.03011},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1985__25_138041/}
}