Existence and exact multiplicity of positive periodic solutions to forced non-autonomous Duffing type differential equations
2005 ◽
Vol 18
(11)
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pp. 1256-1264
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2006 ◽
Vol 73
(2)
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pp. 175-182
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2005 ◽
Vol 42
(4)
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pp. 749-759
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2010 ◽
Vol 82
(3)
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pp. 437-445
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2018 ◽
Vol 15
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2021 ◽
Vol 57
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pp. 103200
2002 ◽
Vol 56
(1)
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pp. 193-202
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