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2. I. M. Rapoport, Oscillations of an Elastic Shell Partially Filled with Liquid [in Russian], Izd-vo Mashinostroenie, Moscow, 1967.
3. N. N. Moiseev, ?On the theory of oscillations of elastic bodies having liquid cavities?, PMM, vol. 23, no. 5, 1959.
4. L. I. Aleksandrovich and R. E. Lamper, ?Natural oscillations of an elastic axisymmetric vessel of arbitrary contour?, collection: Papers of 6th All-Union Conference on Theory of Shells and Plates [in Russian], Baku, 1966, Izd-vo Nauka, 1966.
5. I. H. Palmer and G. W. Asher, ?Calculation of axisymmetric longitudinal modes for fluid-elastic tank-ullage gas systems and comparison with model test results?, AIAA Symposium on Structural Dynamics and Aerolasticity, Boston, Massachusetts, 1965.