@incollection{JEDP_1975____311_0,
     author = {Rolland, Jacques},
     title = {Th\'eor\`eme d'indice pour une classe d'op\'erateurs elliptiques fortement d\'eg\'en\'er\'es sur la fronti\`ere},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     pages = {311--340},
     year = {1975},
     publisher = {Ecole polytechnique},
     doi = {10.5802/jedp.134},
     mrnumber = {58 #11888},
     language = {fr},
     url = {https://www.numdam.org/articles/10.5802/jedp.134/}
}