Classification and existence of positive solutions of fourth-order nonlinear difference equations
2009 ◽
Vol 49
(1)
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pp. 71-92
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2004 ◽
Vol 155
(2)
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pp. 469-478
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2015 ◽
Vol 2015
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pp. 1-10
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2008 ◽
Vol 60
(1)
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pp. 6-28
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2005 ◽
Vol 161
(1)
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pp. 139-148
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2010 ◽
Vol 2010
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pp. 1-16
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2002 ◽
Vol 131
(2-3)
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pp. 583-591
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2015 ◽
Vol 193
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pp. 39-55
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