@article{ASNSP_1971_3_25_1_47_0,
     author = {Hirschowitz, Andr\`e},
     title = {Sur l'approximation des hypersurfaces},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {47--58},
     publisher = {Scuola normale superiore},
     volume = {3e s{\'e}rie, 25},
     number = {1},
     year = {1971},
     mrnumber = {301229},
     zbl = {0208.35105},
     language = {fr},
     url = {http://www.numdam.org/item/ASNSP_1971_3_25_1_47_0/}
}