@article{IVM_1989_3_a1,
     author = {V. V. Ginzburg and I. G. Zel'venskiǐ},
     title = {Group hierarchies in hierarchical packing constructions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {5--12},
     publisher = {mathdoc},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1989_3_a1/}
}