@article{SJL_1972-1973___2_1_0,
     author = {Vaillant, Jean},
     title = {Solutions asymptotiques d'un syst\`eme \`a caract\'eristiques de multiplicit\'e variable},
     journal = {S\'eminaire sur les \'equations aux d\'eriv\'ees partielles},
     pages = {1--35},
     year = {1972-1973},
     publisher = {Coll\`ege de France},
     number = {2},
     language = {fr},
     url = {https://www.numdam.org/item/SJL_1972-1973___2_1_0/}
}