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@article{MS_1969__120_3_a9, author = {{\CYRYA}.{\CYRA}. {\CYRR}{\cyro}{\cyrishrt}{\cyrt}{\cyrb}{\cyre}{\cyrr}{\cyrg} and {\CYRZ}.{\CYRG}. {\CYRSH}{\cyre}{\cyrf}{\cyrt}{\cyre}{\cyrl}{\cyrsftsn}}, title = {{\CYRT}{\cyre}{\cyro}{\cyrr}{\cyre}{\cyrm}{\cyra} {\cyro} {\cyrg}{\cyro}{\cyrm}{\cyre}{\cyro}{\cyrm}{\cyro}{\cyrr}{\cyrf}{\cyri}{\cyrz}{\cyrm}{\cyra}{\cyrh} {\cyrd}{\cyrl}{\cyrya} {\cyrerev}{\cyrl}{\cyrl}{\cyri}{\cyrp}{\cyrt}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyrh} {\cyrs}{\cyri}{\cyrs}{\cyrt}{\cyre}{\cyrm} {\cyri} {\cyre}{\cyre} {\cyrp}{\cyrr}{\cyri}{\cyrl}{\cyro}{\cyrzh}{\cyre}{\cyrn}{\cyri}{\cyrya}}, journal = {Matemati\v{c}eskij sbornik}, pages = {446--472}, publisher = {mathdoc}, volume = {120}, number = {3}, year = {1969}, zbl = {0176.40901}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1969__120_3_a9/} }
Я.А. Ройтберг; З.Г. Шефтель. Теорема о гомеоморфизмах для эллиптических систем и ее приложения. Matematičeskij sbornik, Tome 120 (1969) no. 3, pp. 446-472. http://geodesic.mathdoc.fr/item/MS_1969__120_3_a9/