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@article{MS_1990__181_10_a3, author = {{\CYRP}.{\CYRV}. {\CYRP}{\cyra}{\cyrr}{\cyra}{\cyrm}{\cyro}{\cyrn}{\cyro}{\cyrv}}, title = {{\CYRO} {\cyrg}{\cyra}{\cyrr}{\cyrm}{\cyro}{\cyrn}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyrh} {\cyra}{\cyrp}{\cyrp}{\cyrr}{\cyro}{\cyrk}{\cyrs}{\cyri}{\cyrm}{\cyra}{\cyrc}{\cyri}{\cyrya}{\cyrh} {\cyrv} $C^1$-{\cyrn}{\cyro}{\cyrr}{\cyrm}{\cyre}}, journal = {Matemati\v{c}eskij sbornik}, pages = {1341--1365}, publisher = {mathdoc}, volume = {181}, number = {10}, year = {1990}, zbl = {0716.31004}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1990__181_10_a3/} }
П.В. Парамонов. О гармонических аппроксимациях в $C^1$-норме. Matematičeskij sbornik, Tome 181 (1990) no. 10, pp. 1341-1365. http://geodesic.mathdoc.fr/item/MS_1990__181_10_a3/