Geodesic
An Asymptotic Method for Reducing Systems of Differential Equations with Almost-Periodic Matrices
Matematičeskie zametki, Tome 105 (2019) no. 1, pp. 9-17.

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An asymptotic method for reducing nonautonomous systems of differential equations with matrices represented as sums of matrix functions of different periods to systems with almost-constant matrices is proposed. On the basis of the proposed method, sufficient conditions for the asymptotic stability of solutions of systems of differential equations of this type are derived.
Keywords: nonautonomous system of differential equations, splitting method, asymptotic reducibility method, stability. 
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Yu. A. Konyaev; D. A. Maslov. An Asymptotic Method for Reducing Systems of Differential Equations with Almost-Periodic Matrices. Matematičeskie zametki, Tome 105 (2019) no. 1, pp. 9-17. http://geodesic.mathdoc.fr/item/MZM_2019_105_1_a1/

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