@article{MZ_1976__151_172431,
     author = {Christopher J. Mulvey},
     title = {A {Generalisation} of {Swan's} {Theorem.}},
     journal = {Mathematische Zeitschrift},
     pages = {57--70},
     year = {1976},
     volume = {151},
     zbl = {0321.16020},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__151_172431/}
}