@incollection{AST_1985__131__201_0,
     author = {Boutet de Monvel, L.},
     title = {Syst\`emes presqu'elliptiques : une autre d\'emonstration de la formule de l'indice},
     booktitle = {Colloque en l'honneur de Laurent Schwartz - Volume 1},
     series = {Ast\'erisque},
     pages = {201--216},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {131},
     year = {1985},
     zbl = {0575.58028},
     mrnumber = {816748},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1985__131__201_0/}
}