To cite the dr package in publications use:

Weisberg S (2002). “Dimension reduction regression in R.” Journal of Statistical Software, 7(1), 1–22.

Corresponding BibTeX entry:

  @Article{,
    title = {Dimension reduction regression in R},
    author = {S. Weisberg},
    journal = {Journal of Statistical Software},
    volume = {7},
    number = {1},
    pages = {1--22},
    year = {2002},
  }