1. S. Timoshenko, D.Y. Young, Vibration Problems in Engineering, 3rd Edition, D. van Nostrand, New York, 1961, pp. 329–331.
2. Elastic waves and vibrations of thin rods;Prescott;Philosophical Magazine,1942
3. The propagation of waves in the transverse vibration of bars and plates;Uflyand;Prikladnaya Matematika I Mekhanika,1948
4. Rotary inertia and shear in beam vibration treated by the Ritz method;Dawson;Aeronautical Journal,1968
5. Stress Waves in Solids;Kolsky,1963