To cite package ‘nprotreg’ in publications use:

Taylor CC, Lafratta G, Fensore S (2023). nprotreg: Nonparametric Rotations for Sphere-Sphere Regression. R package version 1.1.1, https://CRAN.R-project.org/package=nprotreg.

Corresponding BibTeX entry:

  @Manual{,
    title = {nprotreg: Nonparametric Rotations for Sphere-Sphere
      Regression},
    author = {Charles C. Taylor and Giovanni Lafratta and Stefania
      Fensore},
    year = {2023},
    note = {R package version 1.1.1},
    url = {https://CRAN.R-project.org/package=nprotreg},
  }