@article{SEDP_1994-1995____A9_0,
     author = {Vassiliev, D.},
     title = {Construction of the wave group for higher order elliptic boundary value problems},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:9},
     pages = {1--14},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1994-1995},
     mrnumber = {1362557},
     language = {en},
     url = {http://www.numdam.org/item/SEDP_1994-1995____A9_0/}
}