@incollection{AST_1983__109-110__101_0,
     author = {Lutz, Robert},
     title = {L'intrusion de l'analyse nonstandard dans l'\'etude des perturbations singuli\`eres},
     booktitle = {IIIe rencontre de g\'eom\'etrie du Schnepfenried Volume 2 - 10-15 mai 1982},
     series = {Ast\'erisque},
     pages = {101--139},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {109-110},
     year = {1983},
     mrnumber = {753145},
     zbl = {0529.58025},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1983__109-110__101_0/}
}