@article{10_4171_ggd_215,
     author = {Gideon Amir and B\'alint Vir\'ag},
     title = {Positive speed for high-degree automaton groups},
     journal = {Groups, geometry, and dynamics},
     pages = {23--38},
     year = {2014},
     volume = {8},
     number = {1},
     doi = {10.4171/ggd/215},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/215/}
}