* "Scaling the Root: Report on the Impact on the DNS Root System of Increasing the Size and Volatility of the Root Zone"<ref>[https://www.icann.org/en/system/files/files/root-scaling-study-report-31aug09-en.pdf Root Scaling Study Report], August 31, 2009 (PDF)</ref> | * "Scaling the Root: Report on the Impact on the DNS Root System of Increasing the Size and Volatility of the Root Zone"<ref>[https://www.icann.org/en/system/files/files/root-scaling-study-report-31aug09-en.pdf Root Scaling Study Report], August 31, 2009 (PDF)</ref> |