The (very) uneven distribution of DNS root servers on the Internet - Pingdom
OVHcloud.com latency grapher for J.ROOT-SERVERS.NET (Verisign AS26415 - IPv6)
k.root-servers.net
DNS Domain Name System Domain names and IP
How many root servers are available on the Internet and where are they physically located? - Quora
根域名伺服器- 維基百科，自由的百科全書
Name Resolution in Windows Server 2012 (R2) - ppt download
Verisign's Perspective on Recent Root Server Attacks
The TCP/IP Guide - DNS Root Name Servers
Why are root server copies important
DNS root servers - Security AffairsSecurity Affairs
The Root Name Servers
Anonymous attacks against the DNS Root Servers. What's true and what's not? - (ISC)² Blog
Root name server - Wikipedia
DNS Root Servers
What are root name servers? | Netnod
Domain Mondo | domainmondo.com: What Is The US Government's Claim to the Internet Root?
CSCI-1680 DNS Rodrigo Fonseca - ppt download
Root Servers in Member Networks | RIPE Labs
k.root-servers.net
SmokePing Latency Page for k-root-servers-net
DNS root server | Cloudflare
