To cite DiceKriging in publications use:

Olivier Roustant, David Ginsbourger, Yves Deville (2012). DiceKriging, DiceOptim: Two R Packages for the Analysis of Computer Experiments by Kriging-Based Metamodeling and Optimization. Journal of Statistical Software, 51(1), 1-55. URL http://www.jstatsoft.org/v51/i01/.

Corresponding BibTeX entry:

  @Article{,
    title = {{DiceKriging}, {DiceOptim}: Two {R} Packages for the
      Analysis of Computer Experiments by Kriging-Based Metamodeling
      and Optimization},
    author = {Olivier Roustant and David Ginsbourger and Yves Deville},
    journal = {Journal of Statistical Software},
    year = {2012},
    volume = {51},
    number = {1},
    pages = {1--55},
    url = {http://www.jstatsoft.org/v51/i01/},
  }