To cite the package 'ca' in publications please use:

Nenadic O, Greenacre M (2007). “Correspondence Analysis in R, with two- and three-dimensional graphics: The ca package.” Journal of Statistical Software, 20(3), 1-13. http://www.jstatsoft.org.

Corresponding BibTeX entry:

  @Article{,
    title = {Correspondence Analysis in R, with two- and
      three-dimensional graphics: The ca package},
    journal = {Journal of Statistical Software},
    volume = {20},
    number = {3},
    pages = {1-13},
    year = {2007},
    author = {O. Nenadic and M. Greenacre},
    url = {http://www.jstatsoft.org},
  }