@article{10_2307_121058,
     author = {Daqing Wan},
     title = {Dwork's conjecture on unit root zeta functions},
     journal = {Annals of mathematics},
     year = {1999},
     volume = {150},
     number = {3},
     doi = {10.2307/121058},
     zbl = {1013.11031},
     url = {http://geodesic.mathdoc.fr/articles/10.2307/121058/}
}