To cite package ‘FGNet’ in publications use:

  Aibar S, Fontanillo C, Droste C, De Las Rivas J (2015) Functional
  Gene Networks: R/Bioc package to generate and analyze gene networks
  derived from functional enrichment and clustering. Bioinformatics,
  31(10), 1686-1688.  doi:10.1093/bioinformatics/btu864

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Sara Aibar and Celia Fontanillo and Conrad Droste and Javier {De Las Rivas}},
    title = {Functional Gene Networks: R/Bioc package to generate and analyze gene networks derived from functional enrichment and clustering},
    journal = {Bioinformatics},
    volume = {31},
    number = {10},
    pages = {1686-1688},
    year = {2015},
    doi = {10.1093/bioinformatics/btu864},
  }