To cite package ‘SpatialNP’ in publications use:

  Sirkia S, Miettinen J, Nordhausen K, Oja H, Taskinen S (2025).
  _SpatialNP: Multivariate Nonparametric Methods Based on Spatial Signs
  and Ranks_. R package version 1.1-6,
  <https://CRAN.R-project.org/package=SpatialNP>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {SpatialNP: Multivariate Nonparametric Methods Based on Spatial Signs and
Ranks},
    author = {Seija Sirkia and Jari Miettinen and Klaus Nordhausen and Hannu Oja and Sara Taskinen},
    year = {2025},
    note = {R package version 1.1-6},
    url = {https://CRAN.R-project.org/package=SpatialNP},
  }