Теорема Пуанкаре — Бендиксона (Ukrainian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Теорема Пуанкаре — Бендиксона" in Ukrainian language version.

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1sciencedirect.com

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doi.org

D'Heedene, R.N. (1961). A third order autonomous differential equation with almost periodic solutions. Journal of Mathematical Analysis and Applications. Elsevier. 3 (2): 344—350. doi:10.1016/0022-247X(61)90059-2. (англ.)

sciencedirect.com

D'Heedene, R.N. (1961). A third order autonomous differential equation with almost periodic solutions. Journal of Mathematical Analysis and Applications. Elsevier. 3 (2): 344—350. doi:10.1016/0022-247X(61)90059-2. (англ.)