Note on the existence of periodic solutions of a second order differential equation
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Publication:5589534
DOI10.4064/AP-21-3-305-307zbMath0194.12101OpenAlexW1024934055WikidataQ115218325 ScholiaQ115218325MaRDI QIDQ5589534
Publication date: 1969
Published in: Annales Polonici Mathematici (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.4064/ap-21-3-305-307
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