@incollection{JEDP_1978____A17_0,
     author = {Bony, Jean-Michel},
     title = {Propagation de singularit\'es pour des \'equations hyperboliques non lin\'eaires},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {17},
     pages = {1--2},
     publisher = {\'Ecole polytechnique},
     year = {1978},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/JEDP_1978____A17_0/}
}