To cite 'cacher' in publications use:

Roger D. Peng (2008). Caching and Distributing Statistical Analyses in R. Journal of Statistical Software 26 (7). URL http://www.jstatsoft.org/v26/i07/.

Corresponding BibTeX entry:

  @Article{,
    title = {Caching and Distributing Statistical Analyses in {R}},
    author = {Roger D. Peng},
    journal = {Journal of Statistical Software},
    year = {2008},
    volume = {26},
    number = {7},
    url = {http://www.jstatsoft.org/v26/i07/},
  }