@misc{indiciae1930bc8c03db,
  title = {Two theorems in catoptrics.},
  author = {J Rubinstein and G Wolansky},
  year = {2002},
  doi = {10.1364/josaa.19.000129},
  url = {https://pubmed.ncbi.nlm.nih.gov/11778715/},
  note = {Source identifier: 11778715}
}