To cite package 'apcluster' in publications use:

Ulrich Bodenhofer, Andreas Kothmeier, and Sepp Hochreiter (2011) APCluster: an R package for affinity propagation clustering Bioinformatics 27:2463-2464. doi:10.1093/bioinformatics/btr406.
Brendan J. Frey and Delbert Dueck (2007). Clustering by passing messages between data points. Science 315:972-977. doi:10.1126/science.1136800.

To obtain the references in BibTex format, enter 'toBibtex(citation("apcluster"))'

Corresponding BibTeX entries:

  @Article{,
    title = {APCluster: an R package for affinity propagation
      clustering},
    author = {Ulrich Bodenhofer and Andreas Kothmeier and Sepp
      Hochreiter},
    journal = {Bioinformatics},
    year = {2011},
    volume = {27},
    pages = {2463--2464},
    doi = {10.1093/bioinformatics/btr406},
  }
  @Article{,
    title = {Clustering by passing messages between data points},
    author = {Brendan J. Frey and Delbert Dueck},
    journal = {Science},
    volume = {315},
    pages = {972--977},
    year = {2007},
    doi = {10.1126/science.1136800},
  }