@conference{256596,
  author = {Ulf Griesmann and Jan Burke},
  title = {Calibrating the sag due to gravity of horizontal interferometer reference flats},
  year = {2012},
  number = {8493},
  month = {2012-09-13},
  publisher = {Interferometry XVI: Techniques and Analysis, Monterey, CA},
  doi = {https://doi.org/10.1117/12.929968},
  language = {en},
}