@misc{indiciaeb00386347aa7,
  title = {Generalized phase-shifting interferometry with arbitrary unknown phase steps for diffraction objects.},
  author = {L Z Cai and Q Liu and X L Yang},
  year = {2004},
  doi = {10.1364/ol.29.000183},
  url = {https://pubmed.ncbi.nlm.nih.gov/14744004/},
  note = {Source identifier: 14744004}
}