Systems of differential equations with periodic coefficients
2014 ◽
Vol 8
(1)
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pp. 20-27
2004 ◽
Vol 68
(2)
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pp. 183-198
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1933 ◽
Vol s1-8
(4)
◽
pp. 283-288
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1969 ◽
Vol 7
(2)
◽
pp. 171-193
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2014 ◽
Vol 55
(5)
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pp. 866-881
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