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@article{MS_1972__130_2_a7, author = {{\CYRF}.{\CYRA}. {\CYRB}{\cyre}{\cyrr}{\cyre}{\cyrz}{\cyri}{\cyrn}}, title = {{\CYRV}{\cyrery}{\cyrp}{\cyru}{\cyrk}{\cyrl}{\cyrery}{\cyre} {\cyrf}{\cyru}{\cyrn}{\cyrk}{\cyrc}{\cyri}{\cyri} {\cyro}{\cyrt} {\cyro}{\cyrp}{\cyre}{\cyrr}{\cyra}{\cyrt}{\cyro}{\cyrr}{\cyra}}, journal = {Matemati\v{c}eskij sbornik}, pages = {268--276}, publisher = {mathdoc}, volume = {130}, number = {2}, year = {1972}, zbl = {0271.47011}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1972__130_2_a7/} }
Ф.А. Березин. Выпуклые функции от оператора. Matematičeskij sbornik, Tome 130 (1972) no. 2, pp. 268-276. http://geodesic.mathdoc.fr/item/MS_1972__130_2_a7/