To cite package 'irace' in publications use:

Manuel López-Ibáñez, Jérémie Dubois-Lacoste, Leslie Pérez Cáceres, Thomas Stützle, and Mauro Birattari. The irace package: Iterated Racing for Automatic Algorithm Configuration. Operations Research Perspectives, 3:43-58, 2016.<doi:10.1016/j.orp.2016.09.002>

Corresponding BibTeX entry:

  @Article{,
    title = {The irace package: Iterated Racing for Automatic Algorithm
      Configuration},
    author = {Manuel López-Ibáñez and Jérémie Dubois-Lacoste and Leslie
      {Pérez Cáceres} and Thomas Stützle and Mauro Birattari},
    year = {2016},
    journal = {Operations Research Perspectives},
    doi = {10.1016/j.orp.2016.09.002},
    volume = {3},
    pages = {43--58},
  }