To cite DEA in publications use:

  David H. Bernstein, Zuleyka Diaz-Martinez and Jose Fernandez-Menendez
  (2026). DEA: Data Envelopment Analysis. R package version 1.0.3.
  https://CRAN.R-project.org/package=DEA

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {DEA: Data Envelopment Analysis},
    author = {David H. Bernstein and Zuleyka Diaz-Martinez and Jose Fernandez-Menendez},
    year = {2026},
    note = {R package version 1.0.3},
    url = {https://CRAN.R-project.org/package=DEA},
  }