To cite package ‘NPHMC’ in publications use:

  Cai C, Wang S, Lu W, Zhang J (2025). _NPHMC: Sample Size Calculation
  for the Proportional Hazards Mixture Cure Model_. R package version
  2.4.2, <https://CRAN.R-project.org/package=NPHMC>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {NPHMC: Sample Size Calculation for the Proportional Hazards Mixture
Cure Model},
    author = {Chao Cai and Songfeng Wang and Wenbin Lu and Jiajia Zhang},
    year = {2025},
    note = {R package version 2.4.2},
    url = {https://CRAN.R-project.org/package=NPHMC},
  }