@article{AFST_2004_6_13_4_493_0,
     author = {Canalis-Durand, Mireille and Sch\"afke, Reinhard},
     title = {Divergence and summability of normal forms of systems of differential equations with nilpotent linear part},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {493--513},
     publisher = {Universit\'e Paul Sabatier, Institut de math\'ematiques},
     address = {Toulouse},
     volume = {Ser. 6, 13},
     number = {4},
     year = {2004},
     mrnumber = {2116814},
     zbl = {02190853},
     language = {en},
     url = {http://www.numdam.org/item/AFST_2004_6_13_4_493_0/}
}