To cite package ‘plgem’ in publications use:

  Pavelka N, Pelizzola M, Vizzardelli C, Capozzoli M, Splendiani A,
  Granucci F, Ricciardi-Castagnoli P. A power law global error model
  for the identification of differentially expressed genes in
  microarray data. BMC Bioinformatics. 2004 Dec 17;5:203.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Pavelka N and Pelizzola M and Vizzardelli C and Capozzoli M and Splendiani A and Granucci F and Ricciardi-Castagnoli P},
    title = {A power law global error model for the identification of differentially expressed genes in microarray data},
    journal = {BMC Bioinformatics},
    volume = {5},
    year = {2004},
    pages = {203},
    doi = {10.1186/1471-2105-5-203},
    publisher = {BioMed Central},
  }