@article{AFST_1980_5_2_1_11_0,
     author = {Francis Cagnac},
     title = {Probl\`eme de {Cauchy} sur un cono{\"\i}de caract\'eristique},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {11--19},
     year = {1980},
     publisher = {Universit\'e Paul Sabatier},
     address = {Toulouse},
     volume = {5e s{\'e}rie, 2},
     number = {1},
     doi = {10.5802/afst.542},
     mrnumber = {583901},
     zbl = {0458.35069},
     language = {fr},
     url = {https://afst.centre-mersenne.org/articles/10.5802/afst.542/}
}