@incollection{JEDP_1979____A8_0,
     author = {Rauch, Jeff},
     title = {Propagation des singularit\'es pour les \'equations des ondes semi-lin\'eaires},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {8},
     pages = {1--2},
     publisher = {Ecole polytechnique},
     year = {1979},
     zbl = {0405.35055},
     language = {fr},
     url = {http://archive.numdam.org/item/JEDP_1979____A8_0/}
}