@misc{indiciaea40bb7a3ef9c,
  title = {Singularities in optimal structural design},
  author = {Patnaik, S. N. and Guptill, J. D. and Berke, L.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920014284},
  note = {Source identifier: 19920014284}
}