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@article{MZM_1985_37_1_a8, author = {L. P. Vlasov}, title = {Subspaces of finite codimension: {The} existence of elements of best approximation}, journal = {Matemati\v{c}eskie zametki}, pages = {78--85}, publisher = {mathdoc}, volume = {37}, number = {1}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1985_37_1_a8/} }
L. P. Vlasov. Subspaces of finite codimension: The existence of elements of best approximation. Matematičeskie zametki, Tome 37 (1985) no. 1, pp. 78-85. http://geodesic.mathdoc.fr/item/MZM_1985_37_1_a8/