@article{ASNSP_1980_4_7_4_625_0,
     author = {Charri\`ere, H\'el\`ene},
     title = {Triangulation formelle de certains syst\`emes de {Pfaff} compl\`etement int\'egrables et application \`a l{\textquoteright}\'etude $C^\infty $ des syst\`emes non lin\'eaires},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {625--714},
     publisher = {Scuola normale superiore},
     volume = {4e s{\'e}rie, 7},
     number = {4},
     year = {1980},
     zbl = {0496.35024},
     language = {fr},
     url = {http://www.numdam.org/item/ASNSP_1980_4_7_4_625_0/}
}