1. Domain name forensics: a systematic approach to investigating an Internet presence;Bruce Nikkel;Digit. Investig.,2004
2. A Survey of Advanced Usages of X.500;IETF,1993
3. Referral Whois Protocol (RWhois);IETF,1997
4. WHOIS Protocol Specification;IETF,2004
5. Cross Registry Internet Service Protocol (CRISP) Requirements;IETF,2004