Your query returned 2 results.

• Optimization of Frames and Trusses under Natural Frequency Constraints,
  M.S. Hayalioglu and M. Ulker
  Paper 8.1 from CCP: 50, ISBN 0-948749-52-0 (1997)
  
• Optimum Design of Frames with Variable Cross Sections under Stability Constraints,
  M.S. Hayalioglu and M. Ulker
  Paper 12.2 from CCP: 18, ISBN 0-948749-20-2 (1993)