@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/}
}