@incollection{SB_1977-1978__20__147_0,
     author = {Kuiper, Nicolaas H.},
     title = {Sph\`eres poly\'edriques flexibles dans $E^3$},
     booktitle = {S\'eminaire Bourbaki : vol. 1977/78, expos\'es 507-524},
     series = {S\'eminaire Bourbaki},
     note = {talk:514},
     pages = {147--168},
     publisher = {Springer-Verlag},
     number = {20},
     year = {1979},
     mrnumber = {554219},
     zbl = {0435.53043},
     language = {fr},
     url = {http://www.numdam.org/item/SB_1977-1978__20__147_0/}
}