@article{AMLG_1978__19_137946,
     author = {Klaus Kaiser},
     title = {On relational selections for complete theories.},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {79--88},
     publisher = {mathdoc},
     volume = {19},
     year = {1978},
     zbl = {0398.03022},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1978__19_137946/}
}