If you use this package, the appropriate paper to cite is:

  J. Berg and M. Laessig “Cross-species analysis of biological networks
  by Bayesian alignment” PNAS 103 (29), 10967-10972 (2006)

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Cross-species analysis of biological networks by Bayesian alignment},
    author = {J. Berg and M. Laessig},
    journal = {PNAS},
    year = {2006},
    volume = {103},
    number = {29},
    pages = {-5},
  }