Applied Mathematics Letters · 2004 · 39 citations · 4 references
Natural SciencesMathematicsDifferential EquationsInitial Value ProblemsPerturbation TheoryPeriodic Solutions Of Differential EquationsRayleigh WavesRayleigh-plesset EquationWave Equations
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Coincidence degree and periodic solutions of Duffing equations
Shiwang Ma, Wang Zhicheng, Jianshe Yu · Nonlinear Analysis · 1998 · 45 citations