@article{AL_1987_26_2_a0,
     author = {O. V. Bogopolskii},
     title = {Arborial decomposability of groups of automorphisms of free},
     journal = {Algebra i logika},
     pages = {131--149},
     year = {1987},
     volume = {26},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1987_26_2_a0/}
}