1. Sokolnikoff, I. S., Mathematical Theory of Elasticity (New York 1956).
2. Sneddon, I. N., Fourier Transforms (New York 1951).
3. Ting, T. C. T., J. Appl. Mech. 35, 248–254 (1968).
4. Ting, T. C. T., J. Appl. Mech. 33, 845–854 (1966).
5. Lee, E. H., Viscoelastic Stress Analysis, Structural Mechanics, Proceedings of the First Symposium on Naval Structural Mechanics (New York 1960).