@article{ASENS_1982_4_15_1_147_0,
     author = {Grigis, A.},
     title = {Propagation des singularit\'es le long de courbes microbicaract\'eristiques pour des op\'erateurs pseudodiff\'erentiels \`a caract\'eristiques doubles. {I}},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {147--159},
     publisher = {Elsevier},
     volume = {4e s{\'e}rie, 15},
     number = {1},
     year = {1982},
     doi = {10.24033/asens.1422},
     mrnumber = {84e:35003},
     zbl = {0494.35088},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.1422/}
}