@article{CRMATH_2002__334_12_1113_0,
     author = {Rivera-Letelier, J.},
     title = {Weak hyperbolicity on periodic orbits for polynomials},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {1113--1118},
     publisher = {Elsevier},
     volume = {334},
     number = {12},
     year = {2002},
     doi = {10.1016/S1631-073X(02)02413-5},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/S1631-073X(02)02413-5/}
}