@article{GDZPPN002204517,
title = {A formula for the Cartier operator on plane algebraic curves.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {374},
year = {1987},
pages = {49-64},
zbl = {0605.14023},
url = {http://dml.mathdoc.fr/item/GDZPPN002204517}
}
Voloch, José Felipe; Stöhr, Karl-Otto. A formula for the Cartier operator on plane algebraic curves.. Journal für die reine und angewandte Mathematik, Tome 374 (1987) pp. 49-64. http://gdmltest.u-ga.fr/item/GDZPPN002204517/