Note to the paper of Fučík and Mawhin
Ján Andres (1990)
Commentationes Mathematicae Universitatis Carolinae
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Ján Andres (1990)
Commentationes Mathematicae Universitatis Carolinae
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Ján Andres (1990)
Czechoslovak Mathematical Journal
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Hana Petzeltová (1973)
Czechoslovak Mathematical Journal
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Ryszard Musielak, Jerzy Popenda (1988)
Publicacions Matemàtiques
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Periodic and asymptotically periodic solutions of the nonlinear equation Δx + af(x) = 0, n ∈ N, are studied.