https://atlarge.icann.org/es/advice_statements/13751
Registration Directory Service (RDS-WHOIS2) Review Team Final Report / At-Large Advice Statement
https://hostbill.atlassian.net/wiki/spaces/DOCS/pages/871628807/Domains+Configuring+Lookup+settings+for+.uk+domains+to+work+with+whois2
Domains: Configuring Lookup settings for .uk domains to work with whois2 - HostBill Docs -...
for uk
https://pear.php.net/pepr/pepr-proposal-show.php?id=654
PEPr :: Details :: Whois2
peprdetails