To cite package ‘pbs’ in publications use:

Wang S (2013). pbs: Periodic B Splines. R package version 1.1, https://CRAN.R-project.org/package=pbs.

ATTENTION: This citation information has been auto-generated from the package DESCRIPTION file and may need manual editing, see ‘help("citation")’.

Corresponding BibTeX entry:

  @Manual{,
    title = {pbs: Periodic B Splines},
    author = {Shuangcai Wang},
    year = {2013},
    note = {R package version 1.1},
    url = {https://CRAN.R-project.org/package=pbs},
  }