Amendola, G.; Manes, A. On a particular class of nonlinear differential equations of second order. (Italian. English summary) Zbl 0672.34012 Riv. Mat. Univ. Parma, IV. Ser. 13, 51-59 (1987). Summary: We study the existence and the uniqueness of solutions for a particular class of non-linear differential equations of second order with initial conditions. We show also that the solutions of such equations must be periodic. MSC: 34A34 Nonlinear ordinary differential equations and systems Keywords:non-linear differential equations of second order PDFBibTeX XMLCite \textit{G. Amendola} and \textit{A. Manes}, Riv. Mat. Univ. Parma, IV. Ser. 13, 51--59 (1987; Zbl 0672.34012)