@article{ASENS_1946_3_63__81_0,
     author = {Marchaud, A.},
     title = {Sur les propri\'et\'es differ\'erentielles du premier ordre des surfaces simples de {Jordan} et quelques applications},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {81--108},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 63},
     year = {1946},
     doi = {10.24033/asens.933},
     mrnumber = {8,571g},
     zbl = {0063.03783},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.933/}
}