@incollection{MSMF_1972__31-32__83_0,
     author = {Chazarain, Jacques},
     title = {Caract\'erisation des probl\`emes mixtes hyperboliques bien pos\'es},
     booktitle = {Colloque d'analyse fonctionnelle (Bordeaux, 1971)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {83--88},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {31-32},
     year = {1972},
     doi = {10.24033/msmf.67},
     mrnumber = {50 #7834},
     zbl = {0247.35078},
     url = {http://www.numdam.org/articles/10.24033/msmf.67/}
}