To cite CEoptim in publications use:

Tim Benham, Qibin Duan, Dirk P. Kroese, Benoit Liquet (2017). CEoptim: Cross-Entropy R Package for Optimization. Journal of Statistical Software, 76(8), 1-29.<doi:10.18637/jss.v076.i08>

Corresponding BibTeX entry:

  @Article{,
    title = {{CEoptim}: Cross-Entropy {R} Package for Optimization},
    author = {Tim Benham and Qibin Duan and Dirk P. Kroese and
      Beno\^{i}t Liquet},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {76},
    number = {8},
    pages = {1--29},
    doi = {10.18637/jss.v076.i08},
  }