1. AAPOR 2010 Online panel task force report https://www.aapor.org/AAPOR_Main/media/MainSiteFiles/AAPOROnlinePanelsTFReportFinalRevised1.pdf
2. AAPOR 2015 Big data task force report https://www.aapor.org/AAPOR_Main/media/Task-Force-Reports/BigDataTaskForceReport_FINAL_2_12_15_b.pdf
3. Estimating the response variance components of the U.S. Bureau of the Census’ survey model;Bailar;Sankhya, Series B,1969
4. Respondent understanding of survey questions;Belson;Polls,1968