@article{PPN243919689_0485+dmdlog14,
title = {Differential characters and characteristic polynomial of Frobenius.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {485},
year = {1997},
pages = {209-219},
zbl = {0871.14035},
url = {http://dml.mathdoc.fr/item/PPN243919689_0485+dmdlog14}
}
Buium, Alexandru. Differential characters and characteristic polynomial of Frobenius.. Journal für die reine und angewandte Mathematik, Tome 485 (1997) pp. 209-219. http://gdmltest.u-ga.fr/item/PPN243919689_0485+dmdlog14/