@misc{1199021,
  author = {P T Boggs and R H Byrd and J R Donaldson and R B Schnabel},
  title = {User's reference guide for ODRPACK::software for weighted orthogonal distance regression version 1.7},
  year = {1989},
  month = {1989-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.89-4103},
  language = {en},
}