@article{SEDP_1988-1989____A9_0,
     author = {Chemin, J.-Y.},
     title = {Gerbes singuli\`eres et singularit\'es du probl\`eme de {Cauchy} hyperbolique},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:9},
     pages = {1--11},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1988-1989},
     mrnumber = {1032285},
     zbl = {0707.35098},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1988-1989____A9_0/}
}