Periodic and subharmonic solutions for a 2&lt;inline-formula&gt;&lt;tex-math id="M1"&gt;\begin{document}$n$\end{document}&lt;/tex-math&gt;&lt;/inline-formula&gt;th-order &lt;inline-formula&gt;&lt;tex-math id="M2"&gt;\begin{document}$\phi_c$\end{document}&lt;/tex-math&gt;&lt;/inline-formula&gt;-Laplacian difference equation containing both advances and retardations
Discrete and continuous dynamical systems. Series S