Please cite the following if utilizing the GEOquery software:

  Davis S, Meltzer P (2007). “GEOquery: a bridge between the Gene
  Expression Omnibus (GEO) and BioConductor.” _Bioinformatics_, *14*,
  1846-1847. doi:10.1093/bioinformatics/btm254
  <https://doi.org/10.1093/bioinformatics/btm254>.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Sean Davis and Paul Meltzer},
    title = {GEOquery: a bridge between the Gene Expression Omnibus (GEO) and BioConductor},
    journal = {Bioinformatics},
    year = {2007},
    volume = {14},
    pages = {1846--1847},
    doi = {10.1093/bioinformatics/btm254},
  }