@incollection{MSMF_1972__31-32__117_0,
     author = {Dacunha-Castelle, Didier},
     title = {Applications des ultraproduits \`a la th\'eorie des plongements des espaces de {Banach}},
     booktitle = {Colloque d'analyse fonctionnelle (Bordeaux, 1971)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {117--125},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {31-32},
     year = {1972},
     doi = {10.24033/msmf.72},
     mrnumber = {51 #13647},
     zbl = {0254.46013},
     url = {http://www.numdam.org/articles/10.24033/msmf.72/}
}