To cite BioNet in publications use one of these references:

  Beisser, D.; Klau, G. W.; Dandekar, T.; Mueller, T. and Dittrich, M.
  (2009). BioNet an R-package for the Functional Analysis of Biological
  Networks. Bioinformatics 26, 1129-1130.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Daniela Beisser and Gunnar W. Klau and Thomas Dandekar and Tobias Mueller and Marcus Dittrich},
    title = {BioNet: an R-package for the Functional Analysis of Biological Networks},
    journal = {Bioinformatics},
    year = {2010},
    volume = {26},
    pages = {1129-1130},
    number = {8},
  }

  Dittrich, M. T.; Klau, G. W.; Rosenwald, A.; Dandekar, T. and
  Mueller, T. (2008). Identifying functional modules in protein-protein
  interaction networks: an integrated exact approach. Bioinformatics
  24, i223-i231.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Marcus T Dittrich and Gunnar W Klau and Andreas Rosenwald and Thomas Dandekar and Tobias Mueller},
    title = {Identifying functional modules in protein-protein interaction networks:
	an integrated exact approach},
    journal = {Bioinformatics},
    year = {2008},
    volume = {24},
    pages = {i223--i231},
    number = {13},
  }