@article{JRAM_1974__266_151425,
     author = {Alan McConnell},
     title = {Polynomial subfields of k (x).},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {136--139},
     publisher = {mathdoc},
     volume = {266},
     year = {1974},
     zbl = {0281.12103},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1974__266_151425/}
}