@incollection{XUPS_1991____111_0,
     author = {Jean Thomann},
     title = {Proc\'ed\'es formels et num\'eriques de sommation de s\'eries solutions d{\textquoteright}\'equations diff\'erentielles},
     booktitle = {S\'eries divergentes et proc\'ed\'es de resommation},
     series = {Journ\'ees math\'ematiques X-UPS},
     pages = {111--128},
     publisher = {Les \'Editions de l{\textquoteright}\'Ecole polytechnique},
     year = {1991},
     doi = {10.5802/xups.1991-03},
     language = {fr},
     url = {https://proceedings.centre-mersenne.org/articles/10.5802/xups.1991-03/}
}