@incollection{JEDP_1995____A5_0,
     author = {Vassiliev, Dimitri G.},
     title = {The symbol of a lagrangian distribution},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {5},
     pages = {1--12},
     publisher = {Ecole polytechnique},
     year = {1995},
     mrnumber = {96j:58164},
     zbl = {0901.58063},
     language = {en},
     url = {http://www.numdam.org/item/JEDP_1995____A5_0/}
}