@incollection{AST_1974__17__79_0,
     author = {Le Potier, Joseph},
     title = {Probl\`emes d'extension de classes de cohomologie},
     booktitle = {S\'eminaire de g\'eom\'etrie analytique},
     editor = {Douady Andr\'e and Verdier Jean-Louis},
     series = {Ast\'erisque},
     pages = {79--109},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {17},
     year = {1974},
     mrnumber = {387668},
     zbl = {0308.32020},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1974__17__79_0/}
}