1. Addition au mémoire sur l'équilibre et le mouvement des corps élastiques;Poisson;Mem. Acad. Sci. Inst. France,1829
2. Jaerisch P., Ueber die elastischen Schwingungen einer isotropen Kugel, https://www.degruyter.com/document/doi/10.1515/9783112341421-toc/html.
3. On the vibrations of an elastic sphere;Lamb;Proc. Lond. Math. Soc.,1881
4. The equations of an isotropic elastic solid in polar and cylindrical co-ordinates their solution and application;Chree;Trans. Camb. Philos. Soc.,1889
5. Three-dimensional vibrations of orthotropic cylinders;Chou;J. Eng. Mech.,1972