@incollection{AST_1985__S131__273_0,
     author = {Kuranishi, Masatake},
     title = {Cartan connections and $CR$ structures with non-degenerate {Levi-form}},
     booktitle = {\'Elie Cartan et les math\'ematiques d'aujourd'hui - Lyon, 25-29 juin 1984},
     series = {Ast\'erisque},
     pages = {273--288},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {S131},
     year = {1985},
     mrnumber = {837204},
     zbl = {0596.53031},
     language = {en},
     url = {http://www.numdam.org/item/AST_1985__S131__273_0/}
}