@misc{indiciae901c12fa7cfd,
  title = {Optimization of spherical facets for parabolic solar concentrators},
  author = {White, J. E. and Erikson, R. J. and Sturgis, J. D. and Elfe, T. B.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19870030899},
  note = {Source identifier: 19870030899}
}