@article{DOCMA_2003__8__a17,
     author = {Edixhoven, Bas and Khare, Chandrashekhar},
     title = {Hasse invariant and group cohomology},
     journal = {Documenta mathematica},
     pages = {43--50},
     publisher = {mathdoc},
     volume = {8},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2003__8__a17/}
}