To cite package ‘ibs’ in publications use:

  Chen F (2018). _ibs: Integral of B-Spline Functions_. R package
  version 1.4, <https://CRAN.R-project.org/package=ibs>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ibs: Integral of B-Spline Functions},
    author = {Feng Chen},
    year = {2018},
    note = {R package version 1.4},
    url = {https://CRAN.R-project.org/package=ibs},
  }

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