To cite the heavy package in publications use:

Osorio, F. (2014). heavy: Package for robust estimation using heavy-tailed distributions. R package version 0.2-35. http://cran.r-project.org/package=heavy

Corresponding BibTeX entry:

  @Manual{,
    title = {heavy: Package for robust estimation using heavy-tailed
      distributions},
    author = {{Osorio} and {F.}},
    year = {2014},
    note = {R package version 0.2-35},
    url = {http://cran.r-project.org/package=heavy},
  }