To cite SamplingStrata in publications use:

Barcaroli G (2014). “SamplingStrata: An R Package for the Optimization of Stratified Sampling.” Journal of Statistical Software, 61(4), 1–24. http://www.jstatsoft.org/v61/i04/.

Corresponding BibTeX entry:

  @Article{,
    title = {{SamplingStrata}: An {R} Package for the Optimization of
      Stratified Sampling},
    author = {Giulio Barcaroli},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {61},
    number = {4},
    pages = {1--24},
    url = {http://www.jstatsoft.org/v61/i04/},
  }