Grigorenko, A.Ya., T. L. Efimova, and Yu. A. Korotkih. “Numerical Solution of the Problem of Axisymmetric Free Vibrations of a Cylinder from Continuously Inhomogeneous Material With in the Spline-Approximation Method”. Reports of the National Academy of Sciences of Ukraine, no. 9 (September 28, 2015): 39–45. Accessed July 11, 2026. https://nasu-periodicals.org.ua/index.php/dp/article/view/15229.