1. Second order approximation of natural frequency constraints in structural synthesis
2. ‘Space frame optimization subject to frequency constraints’, Proc. 27th AIAA/ASME/ASCE/AHS Structures, Structural Dynamics, and Materials Conference, San Antonio, Texas, May 19-21, 1986, pp. 103-115.
3. An efficient approximation technique for frequency constraints in frame optimization
4. ‘An approximation function for frequency constrained structural optimization’, Proc. Second NASA/Air Force Symposium on Recent Advances in Multidisciplinary Analysis and Optimization, Hampton, Virginia, September 28-30, 1988.
5. An algorithm for optimal structural design with frequency constraints