@article{10_4064_fm187_1_1,
     author = {Karsten Keller and Steffen Winter},
     title = {Combinatorics of distance doubling maps},
     journal = {Fundamenta Mathematicae},
     pages = {1--35},
     publisher = {mathdoc},
     volume = {187},
     number = {1},
     year = {2005},
     doi = {10.4064/fm187-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm187-1-1/}
}