

Author: Liu Z.
Publisher: Academic Press
ISSN: 0022-247X
Source: Journal of Mathematical Analysis and Applications, Vol.184, Iss.1, 1996-11, pp. : 46-64
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Abstract
Existence of omega-periodic solutions of n th order ordinary differential equations with nonlinear restoring term h ( x ) and time-variable coefficients is studied without the assumption of boundedness of h ( x ) and h '( x ).