@article{10_4007_annals_2006_164_265,
     author = {Xavier Buff and Arnaud Ch\'eritat},
     title = {The {Brjuno} function continuously estimates the size of quadratic {Siegel} disks},
     journal = {Annals of mathematics},
     pages = {265--312},
     publisher = {mathdoc},
     volume = {164},
     number = {1},
     year = {2006},
     doi = {10.4007/annals.2006.164.265},
     mrnumber = {2233849},
     zbl = {1109.37040},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2006.164.265/}
}