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"Periodic constant-sign solutions for systems of Hill's equations."
Ravi P. Agarwal, Donal O'Regan, Patricia J. Y. Wong (2010)
- Ravi P. Agarwal, Donal O'Regan, Patricia J. Y. Wong
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Periodic constant-sign solutions for systems of Hill's equations. Asymptot. Anal. 67(3-4): 191-216 (2010)
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