@article{10_4064_fm214_1_1,
     author = {Mladen Bestvina},
     title = {A {Bers-like} proof of the existence of
 train tracks for free group automorphisms},
     journal = {Fundamenta Mathematicae},
     pages = {1--12},
     publisher = {mathdoc},
     volume = {214},
     number = {1},
     year = {2011},
     doi = {10.4064/fm214-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm214-1-1/}
}