Periodic solutions for coupled first order nonlinear differential systems of Hamiltonian type
1984 ◽
Vol 8
(11)
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pp. 1271-1285
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Keyword(s):
2008 ◽
Vol 56
(1)
◽
pp. 43-54
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1972 ◽
Vol 40
(1)
◽
pp. 174-182
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