To cite package 'isocir' in publications use:

S. Barragán and M. A. Fernández (2012). isocir: Isotonic Inference for Circular Data. R package version 1.1-1.

Corresponding BibTeX entry:

  @Manual{,
    title = {isocir: Isotonic Inference for Circular Data},
    author = {S. Barragán and M. A. Fernández},
    year = {2012},
    note = {R package version 1.1-1},
  }