@incollection{SB_1954-1956__3__261_0,
     author = {Germain, Paul},
     title = {Les \'equations du type mixte et le probl\`eme de {Tricomi}},
     booktitle = {S\'eminaire Bourbaki : ann\'ees 1954/55 - 1955/56, expos\'es 101-136},
     series = {S\'eminaire Bourbaki},
     note = {talk:124},
     pages = {261--272},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {3},
     year = {1956},
     mrnumber = {1611390},
     zbl = {0147.08503},
     language = {fr},
     url = {http://www.numdam.org/item/SB_1954-1956__3__261_0/}
}