To cite package ‘pgKDEsphere’ in publications use:

  Alonso-Pena M, Claeskens G, Gijbels I (2025). _pgKDEsphere:
  Parametrically Guided Kernel Density Estimator for Spherical Data_. R
  package version 1.0.2,
  <https://CRAN.R-project.org/package=pgKDEsphere>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {pgKDEsphere: Parametrically Guided Kernel Density Estimator for Spherical
Data},
    author = {María Alonso-Pena and Gerda Claeskens and Irène Gijbels},
    year = {2025},
    note = {R package version 1.0.2},
    url = {https://CRAN.R-project.org/package=pgKDEsphere},
  }