@incollection{SB_1962-1964__8__227_0,
     author = {Nachbin, L\'eopoldo},
     title = {R\'egularit\'e des solutions des \'equations diff\'erentielles elliptiques},
     booktitle = {S\'eminaire Bourbaki : ann\'ees 1962/63 - 1963/64, expos\'es 241-276},
     series = {S\'eminaire Bourbaki},
     note = {talk:258},
     pages = {227--237},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {8},
     year = {1964},
     mrnumber = {1611544},
     zbl = {0142.07805},
     language = {fr},
     url = {http://archive.numdam.org/item/SB_1962-1964__8__227_0/}
}