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SAC 042: https://www.icann.org/en/system/files/files/sac-042-en.pdf (later superseded by SAC 046: https://www.icann.org/en/system/files/files/sac-046-en.pdf)
RSSAC 002: https://www.icann.org/en/system/files/files/rssac-002-measurements-root-06jun16-en.pdf
Delegation Rate Scenarios For New gTLDs (6 October 2010): http://www.icann.org/en/topics/newgtlds/delegation-rate-scenarios-newgtlds-06oct10-en.pdf