@misc{indiciae1d09049c33fa,
  title = {Variable Complexity Structural Optimization of Shells},
  author = {Haftka, Raphael T. and Venkataraman, Satchi},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/19990063891},
  note = {Source identifier: 19990063891}
}