To cite DEsubs package please cite the following paper:

  Vrahatis, A. G., Balomenos, P., Tsakalidis, A. K., & Bezerianos, A.
  (2016). DEsubs: an R package for flexible identification of
  differentially expressed subpathways using RNA-seq experiments.
  Bioinformatics, btw544.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Aristidis G Vrahatis and Panos Balomenos and Athanasios Tsakalidis and Anastasios Bezerianos},
    title = {{DEsubs}: an R package for flexible identification of differentially expressed subpathways using RNA-seq experiments},
    journal = {Bioinformatics},
    pages = {btw544},
    year = {2016},
  }