1. Baillargeon, S., Rivest, L.-P.: Stratification: univariate stratification of survey populations. http://cran.r-project.org/web/packages/stratification/index.html (2012)
2. Barbiero, A., Manzi, G.: SunterSampling: Sunter’s sampling design. http://cran.r-project.org/web/packages/SunterSampling/index.html (2012)
3. Barcaroli, G., Pagliuca, D., Willighagen, E.: SamplingStrata: optimal stratification of sampling frames for multipurpose sampling surveys. http://cran.r-project.org/web/packages/SamplingStrata/index.html (2013)
4. Bellhouse, D.: The central limit theorem under simple random sampling. Stat. Comput. Graph. 55, 352–357 (1997)
5. Blair, G., Imai, K.: List: statistical methods for the item count technique and list experiment. http://cran.r-project.org/web/packages/list/index.html (2013)