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@article{MI_1982__67_189680, author = {{\CYRV}.{\CYRV}. {\CYRA}{\cyrm}{\cyre}{\cyrl}{\cyrsftsn}{\cyrk}{\cyri}{\cyrn} and {\CYRD}.{\CYRN}. {\CYRCH}{\cyre}{\cyrb}{\cyra}{\cyrn}}, title = {{\CYRO}{\cyrg}{\cyrr}{\cyra}{\cyrn}{\cyri}{\cyrch}{\cyre}{\cyrn}{\cyrn}{\cyrery}{\cyre} {\cyrr}{\cyre}{\cyrsh}{\cyre}{\cyrn}{\cyri}{\cyrya} {\cyri} {\cyrp}{\cyre}{\cyrr}{\cyri}{\cyro}{\cyrd}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyre} {\cyrk}{\cyro}{\cyrl}{\cyre}{\cyrb}{\cyra}{\cyrn}{\cyri}{\cyrya} {\cyrd}{\cyri}{\cyrf}{\cyrf}{\cyre}{\cyrr}{\cyre}{\cyrn}{\cyrc}{\cyri}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyrh} {\cyrs}{\cyri}{\cyrs}{\cyrt}{\cyre}{\cyrm}}, journal = {Matemati\v{c}eskie issledovani\^a}, pages = {3--10}, publisher = {mathdoc}, volume = {67}, year = {1982}, zbl = {0499.34021}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MI_1982__67_189680/} }
В.В. Амелькин; Д.Н. Чебан. Ограниченные решения и периодические колебания дифференциальных систем. Matematičeskie issledovaniâ, Tome 67 (1982), pp. 3-10. http://geodesic.mathdoc.fr/item/MI_1982__67_189680/