@article{MZM_1994_55_1_a4,
     author = {A. D. Izaak},
     title = {Kolmogorov widths in finite-dimensional spaces with mixed norms},
     journal = {Matemati\v{c}eskie zametki},
     pages = {43--52},
     publisher = {mathdoc},
     volume = {55},
     number = {1},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1994_55_1_a4/}
}