To cite package 'WRS2' in publications use:

################################################################################ The current Package Version:

Mair, P., Schoenbrodt, F., & Wilcox, R (2017). WRS2: Wilcox robust estimation and testing.

Corresponding BibTeX entry:

  @Manual{,
    title = {{WRS2: Wilcox robust estimation and testing}},
    author = {Patrick Mair and Felix Schoenbrodt and Rand Wilcox},
    year = {2017},
    note = {0.9-2},
  }