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Subharmonic Oscillations of Forced Pendulum-type Equations

Bibliographic reference Fonda, A. ; Willem, Michel. Subharmonic Oscillations of Forced Pendulum-type Equations. In: Journal of Differential Equations, Vol. 81, no. 2, p. 215-220 (1989)
Permanent URL http://hdl.handle.net/2078.1/52247