@article{JRAM_1987__377_152924,
     author = {Karsten Schmidt-G\"ottsch},
     title = {Bounds and definablity over fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {18--39},
     publisher = {mathdoc},
     volume = {377},
     year = {1987},
     zbl = {0605.13015},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1987__377_152924/}
}