To cite package 'heplots' in publications use:

John Fox and Michael Friendly and and Georges Monette (2009). heplots: Visualizing Tests in Multivariate Linear Models. R package version 0.8-10. URL http://CRAN.R-project.org/package=heplots

To refer to the theory on which this package is based, also cite:

Friendly, M. (2007). HE plots for Multivariate General Linear Models. Journal of Computational and Graphical Statistics, 2007, 16, 421-444

BibTeX entries for LaTeX users: use ‘toBibtex(citation("heplots"))’

Corresponding BibTeX entries:

  @Manual{,
    title = {{heplots}: Visualizing Tests in Multivariate Linear
      Models},
    author = {John Fox and Michael Friendly and Georges Monette},
    year = {2009},
    note = {R package version 0.8-10},
    url = {http://CRAN.R-project.org/package=heplots},
  }

  @Article{,
    title = {HE plots for Multivariate General Linear Models},
    author = {Michael Friendly},
    year = {2007},
    journal = {Journal of Computational and Graphical Statistics},
    volume = {16},
    number = {4},
    pages = {421--444},
  }