1. Shul`ga, N.A., Propagation of Axisymmetric Elastic Waves in an Orthotropic Elastic Cylinder, Sov. Appl. Mech., 1974, 10, 936–939.
2. Ramskaya, E.I. and Shul`ga, N.A., Study of the Velocities and Modes of Propagation of Axisymmetric Waves along an Orthotropic Hollow Cylinder, Sov. Appl. Mech., 1983, 19, 207–211.
3. Gasser, B., Wellenausbreitung in faserverstärkten Kreiszylinderschalen, Diplomarbeit am Inst, für Mechanik, ETH Zürich, 1981.
4. School of Aerospace and Mechanical Engineering, University of Oklahoma, Final Report, NSF Grant GK-1490;DM Egle,1968
5. Heimann, J.H. and Kolsky, H., The Propagation of Elastic Waves in Thin Cylindrical Shells, J. Mech. Phys. Solids., 1966, 14, 121–130.