Existence of symmetric positive solutions for a multipoint boundary value problem with sign-changing nonlinearity on time scales
2008 ◽
Vol 47
(1-2)
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pp. 186-195
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2005 ◽
Vol 50
(5-6)
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pp. 729-739
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2011 ◽
Vol 38
(1-2)
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pp. 417-427
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