@incollection{AST_1978__59-60__173_0,
     author = {Ramis, Jean-Pierre},
     title = {D\'evissage {Gevrey}},
     booktitle = {Journ\'ees singuli\`eres de Dijon},
     series = {Ast\'erisque},
     pages = {173--204},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {59-60},
     year = {1978},
     mrnumber = {542737},
     zbl = {0409.34018},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1978__59-60__173_0/}
}