1. The role of damping in vibration theory
2. reprinted in VIBRATION Beams, Plates, and Shells, Benchmark Papers in Acoustics, Vol. 8, pp. 364–380. Dowden, Hutchinson & Ross. Stroudsburg, Pa. 1976.
3. ; ; : Vibration damping. John Wiley & Sons, N.Y. 1985.
4. Causality and the Complex Modulus Model of Damping
5. ; : Mechanism of flutter, a theoretical and experimental investigation of the flutter problem. NACA report 685, 1940.