@article{TM_2009_264_a16,
     author = {V. L. Popov},
     title = {Two {Orbits:} {When} {Is} {One} in the {Closure} of the {Other?}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {152--164},
     publisher = {mathdoc},
     volume = {264},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2009_264_a16/}
}