Houbolt, J. C., & Brooks, G. W. (1958). Differential equation of motion for combined flapwise bending, chordwise bending, and torsion of twisted nonuniform rotor blades. NACA.
Chicago Style (17th ed.) CitationHoubolt, John C., and George W. Brooks. Differential Equation of Motion for Combined Flapwise Bending, Chordwise Bending, and Torsion of Twisted Nonuniform Rotor Blades. Washington: NACA, 1958.
MLA (9th ed.) CitationHoubolt, John C., and George W. Brooks. Differential Equation of Motion for Combined Flapwise Bending, Chordwise Bending, and Torsion of Twisted Nonuniform Rotor Blades. NACA, 1958.
Warning: These citations may not always be 100% accurate.