To cite package ‘samplex’ in publications use:

  Ramirez-Valverde G, Ramirez-Valverde B (2025). _samplex: Shiny Tool
  for Sample Size Calculation_. R package version 0.3.0,
  <https://CRAN.R-project.org/package=samplex>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {samplex: Shiny Tool for Sample Size Calculation},
    author = {Gustavo Ramirez-Valverde and Benito Ramirez-Valverde},
    year = {2025},
    note = {R package version 0.3.0},
    url = {https://CRAN.R-project.org/package=samplex},
  }