@article{MZ_1981__176_183629,
     author = {R.C. Valentini and M.L. Madan},
     title = {Automorphism {Groups} of {Algebraic} {Function} {Fields.}},
     journal = {Mathematische Zeitschrift},
     pages = {39--52},
     publisher = {mathdoc},
     volume = {176},
     year = {1981},
     zbl = {0431.12013},
     url = {http://geodesic.mathdoc.fr/item/MZ_1981__176_183629/}
}