PERIODIC SOLUTIONS FOR THIRD ORDER NONLINEAR ORDINARY DIFFERENTIAL EQUATIONS
1992 ◽
pp. 463-470
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On the existence of periodic solutions for the third-order nonlinear ordinary differential equations
1999 ◽
Vol 14
(2)
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pp. 125-130
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2010 ◽
Vol 216
(9)
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pp. 2635-2644
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1996 ◽
Vol 199
(2)
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pp. 445-457
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2006 ◽
Vol 79
(93)
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pp. 51-64
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2010 ◽
Vol 47
(3)
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pp. 573-583
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2010 ◽
Vol 215
(12)
◽
pp. 4304-4319
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1974 ◽
Vol 16
(1)
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pp. 186-199
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Resonant and nonresonant oscillations for some third order nonlinear ordinary differential equations
1988 ◽
Vol 12
(10)
◽
pp. 1029-1046
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