@article{CRMATH_2004__339_3_219_0,
     author = {Petersen, Carsten Lunde},
     title = {When {Schr\"oder} meets {B\"ottcher} {\textendash} convergence of level sets},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {219--222},
     publisher = {Elsevier},
     volume = {339},
     number = {3},
     year = {2004},
     doi = {10.1016/j.crma.2004.05.015},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2004.05.015/}
}