To cite package ‘XICOR’ in publications use:

  Chatterjee S, Holmes S (2023). _XICOR: Robust and generalized
  correlation coefficients_. https://github.com/spholmes/XICOR,
  <https://CRAN.R-project.org/package=XICOR>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {XICOR: Robust and generalized correlation coefficients},
    author = {Sourav Chatterjee and Susan Holmes},
    year = {2023},
    url = {https://CRAN.R-project.org/package=XICOR},
    note = {https://github.com/spholmes/XICOR},
  }