@incollection{AST_1980__80__5_0,
     author = {Berger, Marcel},
     title = {Rapport sur les vari\'et\'es {d'Einstein}},
     booktitle = {Analyse sur les vari\'et\'es (Metz, 1979)},
     series = {Ast\'erisque},
     pages = {5--19},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {80},
     year = {1980},
     mrnumber = {620166},
     zbl = {0473.53039},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1980__80__5_0/}
}