@article{MZM_1996_60_2_a5,
     author = {A. V. Rozhkov},
     title = {Lower central series of a~group of tree automorphisms},
     journal = {Matemati\v{c}eskie zametki},
     pages = {225--237},
     publisher = {mathdoc},
     volume = {60},
     number = {2},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1996_60_2_a5/}
}