1. -. FTC Warns That Rapid Expansion of Internet Domain Name System Could Leave Consumers More Vulnerable. http://1.usa.gov/1LVjyQ5, 2011.
2. -. History Behind .COM. http://bit.ly/1Uhdba0, 2015.
3. -. Root Zone Database. http://bit.ly/1TBSeck, 2015
4. -. Daily DNS Changes and Web Hosting Activity. http://bit.ly/2i9Lqs0v, 2017.
5. -. TLD Zone File Access Program. http://bit.ly/1pxjRrv, 2017.