1. Coverage Bias in Traditional Telephone Surveys of Low-Income and Young Adults;Blumberg;Public Opinion Quarterly,2007
2. Bias in List-Assisted Telephone Samples;Brick;Public Opinion Quarterly,1995
3. Bias in RDD Sampling: A 21st Century Digital World Reassessment;Fahimi,2008
4. Bias in List-Assisted 100-Series RDD Sampling;Fahimi;Public Opinion Quarterly,2008
5. Local Telephone Competition: Status as of December 31, 2007,;Federal Communications Commission,2008