@article{AMLG_1987__26_138052,
     author = {J.N. Crossley and J.B. Kister},
     title = {Natural well-orderings.},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {57--76},
     publisher = {mathdoc},
     volume = {26},
     year = {1987},
     zbl = {0634.03055},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1987__26_138052/}
}