To cite in publications use:

R. K. S. Hankin 2006. Introducing elliptic, an R package for elliptic and modular functions. Journal of Statistical Software 15(7)

Corresponding BibTeX entry:

  @Article{,
    title = {Introducing elliptic, an R package for elliptic and
      modular functions},
    author = {Robin K.S. Hankin},
    journal = {Journal of Statistical Software},
    year = {2006},
    month = {February},
    volume = {15},
    issue = {7},
  }