@article{MZM_2005_78_5_a1,
     author = {N. V. Velichko},
     title = {On {Sequential} {Separability}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {652--657},
     publisher = {mathdoc},
     volume = {78},
     number = {5},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2005_78_5_a1/}
}