@article{10_4153_CMB_2004_023_6,
     author = {Laubie, Fran\c{c}ois},
     title = {Ramification des s\'eries formelles},
     journal = {Canadian mathematical bulletin},
     pages = {237--245},
     year = {2004},
     volume = {47},
     number = {2},
     doi = {10.4153/CMB-2004-023-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2004-023-6/}
}