@article{10_4171_dm_229,
     author = {Lionel Dorat},
     title = {Integral $G$-structures of {Wach} modules},
     journal = {Documenta mathematica},
     pages = {399--440},
     year = {2007},
     volume = {12},
     doi = {10.4171/dm/229},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/229/}
}