Abstract
Some existence theorems are obtained by the least action principle for periodic solutions of nonautonomous second-order systems with a potential which is the sum of a subconvex function and a subquadratic function. © 1999 Academic Press.
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APA
Wu, X. P., & Tang, C. L. (1999). Periodic solutions of a class of non-autonomous second-order systems. Journal of Mathematical Analysis and Applications, 236(2), 227–235. https://doi.org/10.1006/jmaa.1999.6408
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