On the stability of the solutions of a system of two first-order linear differential equations with periodic coefficients for the resonance case
1961 ◽
Vol 25
(4)
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pp. 1187-1191
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2015 ◽
Vol 8
(4)
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pp. 330-344
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1973 ◽
Vol 49
(2)
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pp. 83-87
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1997 ◽
Vol 215
(2)
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pp. 560-576
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