@article{AL_1990_29_2_a1,
     author = {V. V. Bludov and V. F. Kleimenov and E. V. Khlamov},
     title = {A counterexample to a problem of {A.} {Yu.} {Ol'shanski\u{\i}}},
     journal = {Algebra i logika},
     pages = {139--140},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1990_29_2_a1/}
}