References:
  
  1. Optimization concepts and applications in engineering
     Ashok D. Belegundu, Tirupathi R. Chandrupatla
  
  2. Practical Optimization
     Algorithms and Engineering Applications
     Antoniou, Andreas, Lu, Wu-Sheng

  3. Introduction to Optimum Design
     Jasbir Arora.

  4. Engineering Optimization
     Theory and Practice
     Singiresu S. Rao

  5. Structural Optimization
     William R. Spillers
     Keith M. MacBain