Positive solutions for fourth-order singular -Laplacian differential equations with integral boundary conditions.
Zhang, Xingqiu, Cui, Yujun (2010)
Boundary Value Problems [electronic only]
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Zhang, Xingqiu, Cui, Yujun (2010)
Boundary Value Problems [electronic only]
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Pavol Marušiak (1997)
Czechoslovak Mathematical Journal
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Xu, Zhiting (2006)
Portugaliae Mathematica. Nova Série
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Aleksandra Wyrwińska (1983)
Mathematica Slovaca
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Baculíková, B. (2011)
Abstract and Applied Analysis
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Zhiguo Luo, Jian Hua Shen (2004)
Czechoslovak Mathematical Journal
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In this paper, oscillattion and nonoscillation criteria are established for neutral differential equations with positive and negative coefficients. Our criteria improve and extend many results known in the literature.