To cite package ‘psdea’ in publications use:

  Peng J (2026). _psdea: Data Envelopment Analysis with User-Defined
  and Learned Reference Sets_. R package version 1.0.0,
  <https://CRAN.R-project.org/package=psdea>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {psdea: Data Envelopment Analysis with User-Defined and Learned
Reference Sets},
    author = {Jiachao Peng},
    year = {2026},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=psdea},
  }