To cite package ‘categoryCompare’ in publications use:

  Flight RM, Harrison BJ, Mohammad F, Bunge MB, Moon LDF, Petruska JC,
  Rouchka EC (2014). “CATEGORYCOMPARE, an analytical tool based on
  feature annotations.” _Frontiers in Genetics_.
  doi:10.3389/fgene.2014.00098
  <https://doi.org/10.3389/fgene.2014.00098>,
  <http://dx.doi.org/10.3389/fgene.2014.00098>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {CATEGORYCOMPARE, an analytical tool based on feature annotations},
    author = {Robert M Flight and Benjamin J Harrison and Fahim Mohammad and Mary B Bunge and Lawrence D F Moon and Jeffrey C Petruska and Eric C Rouchka},
    year = {2014},
    url = {http://dx.doi.org/10.3389/fgene.2014.00098},
    doi = {10.3389/fgene.2014.00098},
    journal = {Frontiers in Genetics},
  }