To cite package ‘GSCA’ in publications use:

  Ji Z, Vokes S, Dang C, Ji H (2015). “Turning publicly available gene
  expression data into discoveries using gene set context analysis.”
  _Nucleic Acids Res. gkv873_.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Turning publicly available gene expression data into discoveries using gene set context analysis},
    author = {Zhicheng Ji and Steven.A. Vokes and Chi.V. Dang and Hongkai Ji},
    year = {2015},
    journal = {Nucleic Acids Res. gkv873},
  }