@article{AA_2001_13_3_a9,
     author = {G. Yu. Panina},
     title = {The structure of the virtual polytope group with respect to the cyllinder subgroups filtration},
     journal = {Algebra i analiz},
     pages = {179--197},
     year = {2001},
     volume = {13},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2001_13_3_a9/}
}