Periodic solutions of some linear systems of differential equations.
Dang Khanh Hoi (2006)
Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
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Dang Khanh Hoi (2006)
Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
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Colloquium Mathematicae
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Vsevolod F. Lev, Pavel Y. Smeliansky (1995)
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