@article{AIF_1996__46_4_971_0, author = {Guieu, Laurent}, title = {Nombre de rotation, structures g\'eom\'etriques sur un cercle et groupe de {Bott-Virasoro}}, journal = {Annales de l'Institut Fourier}, pages = {971--1009}, publisher = {Association des Annales de l{\textquoteright}institut Fourier}, volume = {46}, number = {4}, year = {1996}, doi = {10.5802/aif.1537}, mrnumber = {98b:22037}, zbl = {0853.17022}, language = {fr}, url = {http://archive.numdam.org/articles/10.5802/aif.1537/} }