@article{1237411,
  author = {Alexander Kramida},
  title = {The program LOPT for least-squares optimization of energy levels},
  year = {2011},
  number = {182},
  month = {2011-02-01 05:02:00},
  publisher = {Computer Physics Communications},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904527},
  doi = {https://doi.org/10.1016/j.cpc.2010.09.019},
  language = {en},
}