Existence of periodic solutions for a kind of second-order neutral functional differential equation
2004 ◽
Vol 157
(2)
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pp. 433-448
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2004 ◽
Vol 21
(2)
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pp. 381-392
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2007 ◽
Vol 326
(2)
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pp. 1161-1173
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2005 ◽
Vol 21
(5)
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pp. 1149-1158
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2005 ◽
Vol 21
(6)
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pp. 1309-1314
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