@incollection{JEDP_1989____A7_0,
     author = {Nadir, Bouchaib and Piriou, Alain},
     title = {Ondes semi-lin\'eaires conormales classiques par rapport \`a deux hypersurfaces transverses},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {7},
     pages = {1--8},
     publisher = {Ecole polytechnique},
     year = {1989},
     mrnumber = {1030822},
     language = {fr},
     url = {http://www.numdam.org/item/JEDP_1989____A7_0/}
}