Cluster sampling (English Wikipedia)

Nelson, Gary A. (July 2014). "Cluster Sampling: A Pervasive, Yet Little Recognized Survey Design in Fisheries Research". Transactions of the American Fisheries Society. 143 (4): 926–938. Bibcode:2014TrAFS.143..926N. doi:10.1080/00028487.2014.901252.
Aga, Gemechu A.; Francis, David C.; Jolevski, Filip; Rodriguez Meza, Jorge L.; Wimpey, Joshua S. (January 2023). "An Application of Adaptive Cluster Sampling to Surveying Informal Businesses". Journal of Survey Statistics and Methodology. 11 (5): 1246–1266. doi:10.1093/jssam/smac037.
LP Galway; Nathaniel Bell; Al S SAE; Amy Hagopian; Gilbert Burnham; Abraham Flaxman; Wiliam M Weiss; Julie Rajaratnam; Tim K Takaro (27 April 2012). "A two-stage cluster sampling method using gridded population data, a GIS, and Google EarthTM imagery in a population-based mortality survey in Iraq". International Journal of Health Geographics. 11 (1): 12. Bibcode:2012IJHGg..11...12G. doi:10.1186/1476-072X-11-12. PMC 3490933. PMID 22540266.

harvard.edu (Global: 18^th place; English: 17^th place)

Nelson, Gary A. (July 2014). "Cluster Sampling: A Pervasive, Yet Little Recognized Survey Design in Fisheries Research". Transactions of the American Fisheries Society. 143 (4): 926–938. Bibcode:2014TrAFS.143..926N. doi:10.1080/00028487.2014.901252.
LP Galway; Nathaniel Bell; Al S SAE; Amy Hagopian; Gilbert Burnham; Abraham Flaxman; Wiliam M Weiss; Julie Rajaratnam; Tim K Takaro (27 April 2012). "A two-stage cluster sampling method using gridded population data, a GIS, and Google EarthTM imagery in a population-based mortality survey in Iraq". International Journal of Health Geographics. 11 (1): 12. Bibcode:2012IJHGg..11...12G. doi:10.1186/1476-072X-11-12. PMC 3490933. PMID 22540266.

Ahmed, Saifuddin (2009). Methods in Sample Surveys (PDF). The Johns Hopkins University and Saifuddin Ahmed. Archived (PDF) from the original on 2013-09-28.

David Brown, Study Claims Iraq's 'Excess' Death Toll Has Reached 655,000, Washington Post, Wednesday, October 11, 2006. Retrieved September 14, 2010.

Ahmed, Saifuddin (2009). Methods in Sample Surveys (PDF). The Johns Hopkins University and Saifuddin Ahmed. Archived (PDF) from the original on 2013-09-28.