@article{SEDP_1978-1979____A22_0,
     author = {Alinhac, S. and Baouendi, M. S.},
     title = {Construction de solutions nulles et singuli\`eres pour des op\'erateurs de type principal},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:22},
     pages = {1--6},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1978-1979},
     mrnumber = {557533},
     zbl = {0427.35082},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1978-1979____A22_0/}
}