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@article{DE_2001_37_1_a16, author = {V. I. Maksimov}, title = {An {Extremal} {Problem} in a {Hilbert} {Space}}, journal = {Differencialʹnye uravneni\^a}, pages = {126--127}, publisher = {mathdoc}, volume = {37}, number = {1}, year = {2001}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_2001_37_1_a16/} }
V. I. Maksimov. An Extremal Problem in a Hilbert Space. Differencialʹnye uravneniâ, Tome 37 (2001) no. 1, pp. 126-127. http://geodesic.mathdoc.fr/item/DE_2001_37_1_a16/