@article{SEDP_1978-1979____A18_0,
     author = {Zachmanoglou, E. C.},
     title = {Flat solutions and singular solutions of linear partial differential equations with analytic coefficients},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:18},
     pages = {1--11},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1978-1979},
     mrnumber = {557529},
     zbl = {0412.35007},
     language = {en},
     url = {http://www.numdam.org/item/SEDP_1978-1979____A18_0/}
}