Nontrivial periodic solutions of a nonautonomous system of second-order differential equations
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Publication:4866478
DOI10.1007/BF02658183zbMath0842.34053OpenAlexW2046352300MaRDI QIDQ4866478
Publication date: 5 May 1996
Published in: Ukrainian Mathematical Journal (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1007/bf02658183
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