To cite package 'fossil' in publications use:

Matthew Vavrek (2010). parfossil: Parallelized functions for palaeoecological and palaeogeographical analysis. R package version 0.2.0.

Corresponding BibTeX entry:

  @Manual{,
    title = {Parallelized functions for palaeoecological and
      palaeogeographical analysis},
    author = {Matthew J. Vavrek},
    year = {2010},
    note = {R package version 0.2.0},
  }