To cite package ‘empichar’ in publications use:

  Basulto-Elias G (2023). _empichar: Evaluates the Empirical
  Characteristic Function for Multivariate Samples_. R package version
  1.0.1, <https://CRAN.R-project.org/package=empichar>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {empichar: Evaluates the Empirical Characteristic Function for Multivariate
Samples},
    author = {Guillermo Basulto-Elias},
    year = {2023},
    note = {R package version 1.0.1},
    url = {https://CRAN.R-project.org/package=empichar},
  }