Citation for the BiplotGUI package:

La Grange, AM, Le Roux, NJ, Gardner-Lubbe, S (2009) BiplotGUI: Interactive Biplots in R. Journal of Statistical Software 30(12):1-37.

Corresponding BibTeX entry:

  @Article{,
    title = {BiplotGUI: Interactive Biplots in R},
    journal = {Journal of Statistical Software},
    volume = {30},
    number = {12},
    pages = {1-37},
    year = {2009},
    author = {AM la Grange and NJ le Roux and S Gardner-Lubbe},
    url = {http://www.jstatsoft.org/v30/i12},
  }