1. ACMA (Australian Communications and Media Authority). 2014. Communications report 2013–14, Australian Government.
2. Andrews, R., Brick, J.M., Mathiowetz, N.A., 2014. Development and Testing of Recreational Fishing Effort Surveys, Testing a Mail Survey Design, Final Report. July 31, 2014. URL: http://www.st.nmfs.noaa.gov/Assets/recreational/pdf/2012-FES_w_review_and_comments_FINAL.pdf.
3. Sea Angling 2012—A Survey of Recreational Sea Angling Activity and Economic Value in England;Armstrong,2013
4. Coverage bias in traditional telephone surveys of low-income and young adults;Blumberg;Public Opin. Q.,2007
5. Reevaluating the need for concern regarding noncoverage bias in landline surveys;Blumberg;Am. J. Public Health,2009