@incollection{JEDP_1987____A18_0,
     author = {Fran\c{c}ois Tr\`eves},
     title = {Formules d'homotopie locales pour le syst\`eme de {Cauchy-Riemann} tangentiel},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {18},
     pages = {1--9},
     publisher = {\'Ecole polytechnique},
     year = {1987},
     zbl = {0638.58024},
     mrnumber = {88k:32008},
     language = {fr},
     url = {https://proceedings.centre-mersenne.org/item/JEDP_1987____A18_0/}
}