@article{10_4171_dm_140,
     author = {G. van der Geer and T. Katsura},
     title = {On the height of {Calabi-Yau} varieties in positive characteristic},
     journal = {Documenta mathematica},
     pages = {97--113},
     year = {2003},
     volume = {8},
     doi = {10.4171/dm/140},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/140/}
}