@incollection{JEDP_1992____A15_0,
     author = {Vassiliev, Dimitri G.},
     title = {Characteristic properties of distributions associated with the wave group},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {15},
     pages = {1--14},
     publisher = {Ecole polytechnique},
     year = {1992},
     mrnumber = {94f:58131},
     zbl = {0771.35036},
     language = {en},
     url = {http://archive.numdam.org/item/JEDP_1992____A15_0/}
}