@article{TM_1997_216_a8,
     author = {V. V. Ryzhikov},
     title = {On the asymmetry of cascades},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {154--157},
     publisher = {mathdoc},
     volume = {216},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1997_216_a8/}
}