To cite icarus in publications use:

Antoine Rebecq (2016). “Icarus: an R package for calibration in survey sampling.” R package version 0.2.0.

Corresponding BibTeX entry:

  @Unpublished{,
    title = {{Icarus}: an R package for calibration in survey
      sampling},
    author = {{Antoine Rebecq}},
    organization = {R Foundation for Statistical Computing},
    year = {2016},
    note = {R package version 0.2.0},
  }