To cite package ‘npcurePK’ in publications use:

  Safari W, López-de-Ullibarri I, Jácome M (2023). _npcurePK: Mixture
  Cure Model Estimation with Cure Status Partially Known_. R package
  version 1.0-2, <https://CRAN.R-project.org/package=npcurePK>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {npcurePK: Mixture Cure Model Estimation with Cure Status Partially Known},
    author = {Wende Clarence Safari and Ignacio López-de-Ullibarri and María Amalia Jácome},
    year = {2023},
    note = {R package version 1.0-2},
    url = {https://CRAN.R-project.org/package=npcurePK},
  }