@article{ASENS_1981_4_14_4_369_0,
     author = {Nygaard, Niels O.},
     title = {Slopes of powers of {Frobenius} on crystalline cohomology},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {369--401},
     publisher = {Elsevier},
     volume = {Ser. 4, 14},
     number = {4},
     year = {1981},
     doi = {10.24033/asens.1411},
     mrnumber = {84d:14011},
     zbl = {0519.14012},
     language = {en},
     url = {http://archive.numdam.org/articles/10.24033/asens.1411/}
}