@misc{indiciae200784624b34,
  title = {Multilevel optimization using a continuum model for structures},
  author = {Yates, K. and Gurdal, Z. and Thangjitham, S.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19930036377},
  note = {Source identifier: 19930036377}
}