To cite package ‘OGI’ in publications use:

Sei T (2017). OGI: Objective General Index. R package version 1.0.0, https://CRAN.R-project.org/package=OGI.

Corresponding BibTeX entry:

  @Manual{,
    title = {OGI: Objective General Index},
    author = {Tomonari Sei},
    year = {2017},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=OGI},
  }