1. Dawson B. The Ritz method applied to the vibration of pre-twist cantilever beams allowing for rotary inertia and shear deformation. To be published in the Journal of the American Society of Mechanical Engineers, (Brief Notes). (Accepted for publication).
2. Coupled bending and torsional vibrations in a twisted rotating blade;Montoya;Brown-Boveri Review,1966
3. Houbolt J. C. and Brook G. W. Differential equations of motion for combined flapwise bending, chordwise bending and torsion of twisted non-Uniform rotor blades. NACA Technical Report 1346, 1958.
4. Coupled Bending-Bending Vibrations of Pre-Twisted Cantilever Blading Treated by the Rayleigh-Ritz Energy Method
5. Isakson G. and Eisley G. J. Natural frequencies in coupled bending and torsion of twisted rotating and non-rotating blades. NASA, 1964. (Prepared under Grant No. NS6-27-59 by the University of Michigan.)