@incollection{SB_1979-1980__22__11_0,
     author = {Demazure, Michel},
     title = {Caract\'erisations de l'espace projectif (conjectures de {Hartshorne} et de {Frankel)}},
     booktitle = {S\'eminaire Bourbaki : vol. 1979/80, expos\'es 543-560},
     series = {S\'eminaire Bourbaki},
     note = {talk:544},
     pages = {11--19},
     publisher = {Springer-Verlag},
     number = {22},
     year = {1981},
     mrnumber = {636514},
     zbl = {0469.14008},
     language = {fr},
     url = {http://www.numdam.org/item/SB_1979-1980__22__11_0/}
}