@article{10_4007_annals_2007_166_145,
     author = {Oleg S. Kozlovski and Weixiao Shen and Sebastian van Strien},
     title = {Density of hyperbolicity in dimension one},
     journal = {Annals of mathematics},
     pages = {145--182},
     publisher = {mathdoc},
     volume = {166},
     number = {1},
     year = {2007},
     doi = {10.4007/annals.2007.166.145},
     mrnumber = {2342693},
     zbl = {1138.37013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2007.166.145/}
}