@article{AFST_1954_4_18__161_0,
     author = {J. Bachellier and H. Gardy},
     title = {Applications du calcul symbolique graphique \`a l'\'etude des syst\`emes diff\'erentielles lin\'eaires},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {161--177},
     publisher = {\'Edouard Privat, Libraire-\'Editeur},
     address = {Toulouse},
     volume = {4e s{\'e}rie, 18},
     year = {1954},
     zbl = {0067.19102},
     mrnumber = {74115},
     language = {fr},
     url = {https://afst.centre-mersenne.org/item/AFST_1954_4_18__161_0/}
}