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@article{MS_1965__110_3_a1, author = {{\CYRA}.{\CYRA}. {\CYRA}{\cyrn}{\cyrd}{\cyrr}{\cyro}{\cyrn}{\cyro}{\cyrv} and {\CYRE}.{\CYRA}. {\CYRL}{\cyre}{\cyro}{\cyrn}{\cyrt}{\cyro}{\cyrv}{\cyri}{\cyrch}}, title = {{\CYRD}{\cyri}{\cyrn}{\cyra}{\cyrm}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyre} {\cyrs}{\cyri}{\cyrs}{\cyrt}{\cyre}{\cyrm}{\cyrery} {\cyrp}{\cyre}{\cyrr}{\cyrv}{\cyro}{\cyrishrt} {\cyrs}{\cyrt}{\cyre}{\cyrp}{\cyre}{\cyrn}{\cyri} {\cyrn}{\cyre}{\cyrg}{\cyrr}{\cyru}{\cyrb}{\cyro}{\cyrs}{\cyrt}{\cyri} {\cyrn}{\cyra} {\cyrp}{\cyrl}{\cyro}{\cyrs}{\cyrk}{\cyro}{\cyrs}{\cyrt}{\cyri}}, journal = {Matemati\v{c}eskij sbornik}, pages = {328--372}, publisher = {mathdoc}, volume = {110}, number = {3}, year = {1965}, zbl = {0143.11902}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1965__110_3_a1/} }
А.А. Андронов; Е.А. Леонтович. Динамические системы первой степени негрубости на плоскости. Matematičeskij sbornik, Tome 110 (1965) no. 3, pp. 328-372. http://geodesic.mathdoc.fr/item/MS_1965__110_3_a1/