@article{AFST_1998_6_7_1_135_0,
     author = {Marti, Jean-Andr\'e and Nuiro, Silvere Paul and Valmorin, Vincent},
     title = {Alg\`ebres diff\'erentielles et probl\`eme de {Goursat} non lin\'eaire \`a donn\'ees irr\'eguli\`eres},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {135--159},
     publisher = {Universit\'e Paul Sabatier. Facult\'e des sciences},
     address = {Toulouse},
     volume = {6e s{\'e}rie, 7},
     number = {1},
     year = {1998},
     mrnumber = {1658460},
     zbl = {0915.35006},
     language = {fr},
     url = {http://www.numdam.org/item/AFST_1998_6_7_1_135_0/}
}