@incollection{SB_1979-1980__22__225_0,
     author = {B\'erard Bergery, Lionel},
     title = {La courbure scalaire des vari\'et\'es riemanniennes},
     booktitle = {S\'eminaire Bourbaki : vol. 1979/80, expos\'es 543-560},
     series = {S\'eminaire Bourbaki},
     note = {talk:556},
     pages = {225--245},
     publisher = {Springer-Verlag},
     number = {22},
     year = {1981},
     mrnumber = {636526},
     zbl = {0461.53023},
     language = {fr},
     url = {http://www.numdam.org/item/SB_1979-1980__22__225_0/}
}