Morozov, N. P. Periodic solutions of the equation \(\ddot x+\lambda f(ax+b\dot x)\dot x+x=0\). (Russian) Zbl 0625.34045 Differ. Uravn. 22, No. 5, 905-907 (1986). A second order differential equation with a parameter is studied. The limits of the set of the values of the parameter for which the equation has a limit cycle are found. Reviewer: S.G.Hristova MSC: 34C25 Periodic solutions to ordinary differential equations Keywords:second order differential equation; parameter; limit cycle PDFBibTeX XMLCite \textit{N. P. Morozov}, Differ. Uravn. 22, No. 5, 905--907 (1986; Zbl 0625.34045)