A generalization of variation of parameters and Lyapunov’s method
2003 ◽
Vol 139
(1)
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pp. 95-110
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1979 ◽
Vol s2-20
(2)
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pp. 293-299
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2002 ◽
Vol 13
(9)
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pp. 1857-1869
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1964 ◽
Vol 8
(3)
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pp. 392-405
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1996 ◽
Vol 19
(1)
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pp. 172-180
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