@article{MZ_1987__196_173863,
     author = {Robert C. Valentini},
     title = {The {Deuring-Safarevic} {Formula} {Revisited.}},
     journal = {Mathematische Zeitschrift},
     pages = {59--64},
     publisher = {mathdoc},
     volume = {196},
     year = {1987},
     zbl = {0601.12021},
     url = {http://geodesic.mathdoc.fr/item/MZ_1987__196_173863/}
}