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@article{MS_1973__133_1_a7, author = {{\CYRA}.{\CYRM}. {\CYRO}{\cyrl}{\cyre}{\cyrv}{\cyrs}{\cyrk}{\cyri}{\cyrishrt}}, title = {{\CYRP}{\cyrr}{\cyri}{\cyrm}{\cyre}{\cyrr} {\cyro}{\cyrr}{\cyrt}{\cyro}{\cyrn}{\cyro}{\cyrr}{\cyrm}{\cyri}{\cyrr}{\cyro}{\cyrv}{\cyra}{\cyrn}{\cyrn}{\cyro}{\cyrishrt} {\cyrs}{\cyri}{\cyrs}{\cyrt}{\cyre}{\cyrm}{\cyrery} {\cyrs}{\cyrh}{\cyro}{\cyrd}{\cyri}{\cyrm}{\cyro}{\cyrs}{\cyrt}{\cyri} {\cyrv} $C$, {\cyrn}{\cyro} {\cyrn}{\cyre} {\cyrv} {L}$^2$}, journal = {Matemati\v{c}eskij sbornik}, pages = {134--141}, publisher = {mathdoc}, volume = {133}, number = {1}, year = {1973}, zbl = {0274.42014}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1973__133_1_a7/} }
А.М. Олевский. Пример ортонормированной системы сходимости в $C$, но не в L$^2$. Matematičeskij sbornik, Tome 133 (1973) no. 1, pp. 134-141. http://geodesic.mathdoc.fr/item/MS_1973__133_1_a7/