@article{JRAM_1982__335_152463,
     author = {Robert C. Valentini},
     title = {Representations of automorphisms on differentials of function fields of characteristic p.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {164--179},
     publisher = {mathdoc},
     volume = {335},
     year = {1982},
     zbl = {0485.12013},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1982__335_152463/}
}