To cite package gMCP in publications use

Kornelius Rohmeyer, Florian Klinglmueller (2014). gMCP: Graph Based Multiple Test Procedures. R package version 0.8-6. URL http://CRAN.R-project.org/package=gMCP
Frank Bretz, Martin Posch, Ekkehard Glimm, Florian Klinglmueller, Willi Maurer, Kornelius Rohmeyer (2011), Graphical approaches for multiple comparison procedures using weighted Bonferroni, Simes or parametric tests. Biometrical Journal 53 (6), pages 894--913, Wiley.

Corresponding BibTeX entries:

  @Manual{,
    title = {{gMCP}: Graph Based Multiple Test Procedures},
    author = {Kornelius Rohmeyer and Florian Klinglmueller},
    year = {2014},
    note = {R package version 0.8-6},
    url = {http://CRAN.R-project.org/package=gMCP},
  }
  @Article{,
    title = {Graphical approaches for multiple comparison procedures
      using weighted Bonferroni, Simes or parametric tests},
    author = {Frank Bretz and Martin Posch and Ekkehard Glimm and
      Florian Klinglmueller and Willi Maurer and Kornelius Rohmeyer},
    journal = {Biometrical Journal},
    year = {2011},
    publisher = {Wiley},
    volume = {53},
    number = {6},
    pages = {894--913},
    url =
      {http://onlinelibrary.wiley.com/doi/10.1002/bimj.201000239/full},
  }