@article{10_4064_fm185_1_4,
     author = {Weixiao Shen and Michael Todd},
     title = {Real $C^k$ {Koebe} principle},
     journal = {Fundamenta Mathematicae},
     pages = {61--69},
     publisher = {mathdoc},
     volume = {185},
     number = {1},
     year = {2005},
     doi = {10.4064/fm185-1-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm185-1-4/}
}