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@article{MZM_1979_25_2_a0, author = {L. P. Vlasov}, title = {Uniqueness of generalized elements of best approximation}, journal = {Matemati\v{c}eskie zametki}, pages = {161--175}, publisher = {mathdoc}, volume = {25}, number = {2}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1979_25_2_a0/} }
L. P. Vlasov. Uniqueness of generalized elements of best approximation. Matematičeskie zametki, Tome 25 (1979) no. 2, pp. 161-175. http://geodesic.mathdoc.fr/item/MZM_1979_25_2_a0/