A necessary condition for the existence of periodic solutions of certain three dimensional autonomous systems

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PERIODIC SOLUTIONS OF CERTAIN THREE DIMENSIONAL AUTONOMOUS SYSTEMS

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periodic solutions of certain three dimensional autonomous systems

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ژورنال

عنوان ژورنال: Applied Mathematics Letters

سال: 2009

ISSN: 0893-9659

DOI: 10.1016/j.aml.2009.01.045