@article{TIMM_2001_7_2_a16,
     author = {D. S. Perevalov},
     title = {Topological invariants like separability},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {228--235},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2001_7_2_a16/}
}