To cite package ‘polspline’ in publications use:

Kooperberg C (2024). polspline: Polynomial Spline Routines. R package version 1.1.25, https://CRAN.R-project.org/package=polspline.

Corresponding BibTeX entry:

  @Manual{,
    title = {polspline: Polynomial Spline Routines},
    author = {Charles Kooperberg},
    year = {2024},
    note = {R package version 1.1.25},
    url = {https://CRAN.R-project.org/package=polspline},
  }