@incollection{JEDP_1992____A4_0,
     author = {Martin Costabel and Monique Dauge},
     title = {Singularit\'es d'ar\^etes pour les probl\`emes aux limites elliptiques},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {4},
     pages = {1--12},
     publisher = {\'Ecole polytechnique},
     year = {1992},
     mrnumber = {93j:35201},
     language = {fr},
     url = {https://proceedings.centre-mersenne.org/item/JEDP_1992____A4_0/}
}