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@article{MZM_1978_24_4_a5, author = {L. P. Vlasov}, title = {Properties of generalized elements of best approximation}, journal = {Matemati\v{c}eskie zametki}, pages = {513--522}, publisher = {mathdoc}, volume = {24}, number = {4}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1978_24_4_a5/} }
L. P. Vlasov. Properties of generalized elements of best approximation. Matematičeskie zametki, Tome 24 (1978) no. 4, pp. 513-522. http://geodesic.mathdoc.fr/item/MZM_1978_24_4_a5/