Solvability of a periodic boundary-value problem for a system of first-order ordinary differential equations with (β,γ,δ)-comparison pairs
2000 ◽
Vol 101
(4)
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pp. 3365-3371
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2002 ◽
Vol 272
(1)
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pp. 67-78
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1996 ◽
Vol 204
(1)
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pp. 65-73
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2002 ◽
Vol 138
(2)
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pp. 205-217
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1999 ◽
Vol 104
(1)
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pp. 51-63
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2010 ◽
Vol 234
(12)
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pp. 3261-3267
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1995 ◽
Vol 18
(4)
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pp. 757-764
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