Please use the following citation when using goSTAG for your research:

  Bennett BD and Bushel PR. goSTAG: Gene Ontology Subtrees to Tag and
  Annotate Genes within a set. Source Code Biol Med. 2017 Apr 13.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Brian D. Bennett and Pierre R. Bushel},
    title = {goSTAG: Gene Ontology Subtrees to Tag and Annotate Genes within a set},
    journal = {Source Code Biol Med},
    year = {2017},
  }