Sharp a priori bounds for periodic solutions to second-order vector differential equations

[1] Zevin A. A.(1985)undefined Differ. Uravn. 21 932-937

[2] Zevin A. A.(2007)undefined J. Math. Anal. Appl. 332 390-399

[3] Pinsky M. A.(1994)undefined J. Math. Anal. Appl. 186 778-798

[4] Mawhin J.(1969)undefined Proc. Am. Math. Soc. 22 509-512

[5] Walter W.(undefined)undefined undefined undefined undefined-undefined

[6] Yorke J.(undefined)undefined undefined undefined undefined-undefined

[1] Zevin A. A.(1985)undefined Differ. Uravn. 21 932-937

[2] Zevin A. A.(2007)undefined J. Math. Anal. Appl. 332 390-399

[3] Pinsky M. A.(1994)undefined J. Math. Anal. Appl. 186 778-798

[4] Mawhin J.(1969)undefined Proc. Am. Math. Soc. 22 509-512

[5] Walter W.(undefined)undefined undefined undefined undefined-undefined

[6] Yorke J.(undefined)undefined undefined undefined undefined-undefined