To cite ofw in publications use:

Kim-Anh Le Cao, Patrick Chabrier (2008). ofw: An R Package to Select Continuous Variables for Multiclass Classification with a Stochastic Wrapper Method. Journal of Statistical Software 28(9), 1-16. URL http://www.jstatsoft.org/v28/i09/.

Corresponding BibTeX entry:

  @Article{,
    title = {{ofw}: An {R} Package to Select Continuous Variables for
      Multiclass Classification with a Stochastic Wrapper Method},
    author = {Kim-Anh L\^e Cao and Patrick Chabrier},
    journal = {Journal of Statistical Software},
    year = {2008},
    volume = {28},
    number = {9},
    pages = {1--16},
    url = {http://www.jstatsoft.org/v28/i09/},
  }