1. Houbolt, John C , and Kordes, Eldon E., Structural Response to Discrete and Continuous Gusts of an Airplane Having Wing Bending Flexibility and a Correlation of Calculated and Flight Results, NACA Report 1181, 1954.
2. Pian, T. H. H., and Winter, P. H., Effect of Structural Flexibility on Aircraft Loading, Part XVI-Estimation of the Dynamic Overstress in Straight Wing Airplanes, AF Technical Report No. 6358, Part XVI, February, 1954.