Multiplicity Results via Topological Degree for Impulsive Boundary Value Problems under Non-Well-Ordered Upper and Lower Solution Conditions
2007 ◽
Vol 45
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pp. 189-200
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2009 ◽
Vol 223
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pp. 543-551
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2002 ◽
Vol 147
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pp. 41-52
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2002 ◽
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pp. 51-64
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