@article{IM_1989__96_1_143690,
     author = {Marshall M. Cohen},
     title = {On the dynamics and the fixed subgroup of a free group automorphism.},
     journal = {Inventiones mathematicae},
     pages = {613--638},
     publisher = {mathdoc},
     volume = {96},
     number = {1},
     year = {1989},
     zbl = {0678.57001},
     url = {http://geodesic.mathdoc.fr/item/IM_1989__96_1_143690/}
}