1. Vibrationen eines Ringes in seiner Ebene;Hoppe;Journal für Mathematik (Crelle),1871
2. On the free vibrations of an infinite plate of homogeneous isotropic elastic matter;Rayleigh,1889
3. Numerical studies of elastic disk contour modes lacking axial symmetry;Holland;Journal of the Acoustical Society of America,1966
4. A Treatise on the Mathematical Theory of Elasticity;Love,1944
5. Free Vibrations of Circular Cylindrical Shells;Armenakas,1969