On the existence of periodic solutions of z′(t) = −az(t − r + μk(t, z(t))) + F(t)
نویسندگان
چکیده
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ژورنال
عنوان ژورنال: Journal of Differential Equations
سال: 1969
ISSN: 0022-0396
DOI: 10.1016/0022-0396(69)90002-3