1. (1) Kerwin, E. M. Jr., Damping of Flexural Waves by a Constrained Viscoelastic Layer, J. Acoust. Soc. Am., Vol. 31. No. 7 (1959), p. 952.
2. (2) Ross, D., Unger, E. E. and Kerwin, E. M. Jr., Structural Damping, Part 3, Ed. Ruzica, J. E., ASME (1959), p. 49, Pergamon Press.
3. (3) DiTaranto, R. A., Theory of Vibratory Bending for Elastic and Viscoelastic Layered Finite Length Beams, Trans. ASME, J. Appl. Mech., Vol. 32, No. 4 (1965), p. 881.
4. (4) Mead, D. J. and Markus, S., The Forced Vibration of a Three-Layer Damped Sandwich Beam with Arbitrary Boundary Conditions, J. Sound Vib., Vol. 10, No. 2 (1969), p. 163.
5. (5) Markus, S., Oravsky, V. and Simokova, O., Damping Properties of Sandwich Beam with Local Shearing Prevention, Acoustica, Vol. 31 (1974), p. 132.