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2. Turner, M. J.: Design of Minimum Mass Structures with Specified Natural frequencies, AIAA J. 5, 406–412 (1967).
3. Ashley, H., and S. C. McIntosh: Expanding the Consciousness of the Aeroelastician, Proc. of ASME Symposium, Fluid-Solid Interaction, Pittsburgh, Nov. 1967, pp. 120–143.
4. McIntosh, S. C., and F. E. Eastep: Design of Minimum-Mass Structures with Specified Stiffness Properties, AIAA J. 6, 962–964 (1968).
5. Turner, M. J.: Optimization of Structures to Satisfy Flutter Requirements, unnumbered report of Commercial Airplane Division, The Boeing Co., 1968 (to appear in AIAA J.).