Voir la notice de l'article provenant de la source Math-Net.Ru
@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/} }
A. D. Izaak. Kolmogorov widths in finite-dimensional spaces with mixed norms. Matematičeskie zametki, Tome 55 (1994) no. 1, pp. 43-52. http://geodesic.mathdoc.fr/item/MZM_1994_55_1_a4/