Rajović, Miloje; Dimitrovski, Dragan Amplitudes of linear oscillations determined by linear homogenous differential equation of the second order and Liouville-Besge formulae. (English) Zbl 1299.34125 Kragujevac J. Math. 35, No. 1, 89-97 (2011). MSC: 34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations 34C20 Transformation and reduction of ordinary differential equations and systems, normal forms 34A30 Linear ordinary differential equations and systems Keywords:quadraturally-oscillatory solutions; variable amplitude; relation between amplitude and frequency PDFBibTeX XMLCite \textit{M. Rajović} and \textit{D. Dimitrovski}, Kragujevac J. Math. 35, No. 1, 89--97 (2011; Zbl 1299.34125)