Two-point boundary value problems for planar systems: A lower and upper solutions approach
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2010 ◽
Vol 36
(1-2)
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pp. 275-289
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Keyword(s):
2006 ◽
Vol 322
(2)
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pp. 675-692
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1997 ◽
Vol 215
(2)
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pp. 415-422
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2020 ◽
Vol 9
(6)
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pp. 4155-4164
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Keyword(s):
2020 ◽
Vol 51
(4)
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pp. 1399-1416
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