@article{SEDP_1971-1972____A9_0,
     author = {Dacunha-Castelle, D.},
     title = {Ultraproduits d'espaces de {Banach}},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:9},
     pages = {1--11},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1971-1972},
     mrnumber = {397373},
     zbl = {0243.46030},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1971-1972____A9_0/}
}