@incollection{SB_1975-1976__18__81_0,
     author = {Rosenberg, Harold},
     title = {Les diff\'eomorphismes du cercle},
     booktitle = {S\'eminaire Bourbaki : vol. 1975/76, expos\'es 471-488},
     series = {S\'eminaire Bourbaki},
     note = {talk:476},
     pages = {81--98},
     publisher = {Springer-Verlag},
     number = {18},
     year = {1977},
     mrnumber = {455050},
     zbl = {0352.58012},
     language = {fr},
     url = {http://www.numdam.org/item/SB_1975-1976__18__81_0/}
}