To cite rBiopaxParser in publications use:

  Kramer F, Bayerlova M, Klemm F, Bleckmann A, Beissbarth T (2013).
  rBiopaxParser - an R package to parse, modify and visualize BioPAX
  data. Bioinformatics 2013, 29(4), 520-522.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {rBiopaxParser - an R package to parse, modify and visualize BioPAX data},
    author = {Frank Kramer and Michaela Bayerlova and Florian Klemm and Annalen Bleckmann and Tim Beissbarth},
    journal = {Bioinformatics},
    volume = {29},
    issue = {4},
    pages = {520-522},
    year = {2013},
  }