@incollection{SB_1948-1951__1__65_0,
     author = {Schwartz, Laurent},
     title = {Sur un m\'emoire de {Petrowsky} : {\guillemotleft} {\"Uber} das {Cauchysche} {Problem} f\"ur ein {System} linearer partieller {Differentialgleichungen} im {Gebiete} der nichtanalytischen {Funktionen} {\guillemotright}},
     booktitle = {S\'eminaire Bourbaki : ann\'ees 1948/49 - 1949/50 - 1950/51, expos\'es 1-49},
     series = {S\'eminaire Bourbaki},
     note = {talk:11},
     pages = {65--69},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {1},
     year = {1952},
     mrnumber = {1605192},
     zbl = {0100.30205},
     language = {fr},
     url = {http://archive.numdam.org/item/SB_1948-1951__1__65_0/}
}