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Periodic and almost periodic solutions of functional-differential equations. (English) Zbl 0129.06006


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[1] Antosiewicz, H. A., Forced periodic solutions of systems of differential equations. Ann. Math. 57, 314–317 (1953). · Zbl 0050.09104 · doi:10.2307/1969861
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[16] Shimanov, N., Almost periodic solutions in nonlinear systems with retardation. Dokl. Akad. Nauk SSSR 125, 1203–1206 (1959). [In Russian.] · Zbl 0088.29901
[17] Hale, J. K., & I. Seifert, Bounded and almost periodic solutions of singularly perturbed equations. J. Math. Anal. Appl. 3, 18–24 (1961). · Zbl 0099.29401 · doi:10.1016/0022-247X(61)90003-8
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