To cite rrcov in publications use:

Valentin Todorov, Peter Filzmoser (2009). An Object-Oriented Framework for Robust Multivariate Analysis. Journal of Statistical Software, 32(3), 1-47. URL http://www.jstatsoft.org/v32/i03/.

Corresponding BibTeX entry:

  @Article{,
    title = {An Object-Oriented Framework for Robust Multivariate
      Analysis},
    author = {Valentin Todorov and Peter Filzmoser},
    journal = {Journal of Statistical Software},
    year = {2009},
    volume = {32},
    number = {3},
    pages = {1--47},
    url = {http://www.jstatsoft.org/v32/i03/},
  }