@article{SEDP_1986-1987____A7_0,
     author = {David, G.},
     title = {Solutions de l'\'equation de {Beltrami}},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:8},
     pages = {1--8},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1986-1987},
     mrnumber = {920026},
     zbl = {0645.30011},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1986-1987____A7_0/}
}