To cite package ‘EESPCA’ in publications use:

  Frost HR (2025). _EESPCA: Eigenvectors from Eigenvalues Sparse
  Principal Component Analysis (EESPCA)_. R package version 0.8.0,
  <https://CRAN.R-project.org/package=EESPCA>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {EESPCA: Eigenvectors from Eigenvalues Sparse Principal Component
Analysis (EESPCA)},
    author = {H. Robert Frost},
    year = {2025},
    note = {R package version 0.8.0},
    url = {https://CRAN.R-project.org/package=EESPCA},
  }