1. Akamai. 2020. Designing DNS for Availability and Resilience Against DDoS Attacks. akamai.com/us/en/multimedia/documents/white-paper/akamai-designing-dns-for-availability-and-resilience-against-ddos-attacks.pdf Akamai. 2020. Designing DNS for Availability and Resilience Against DDoS Attacks. akamai.com/us/en/multimedia/documents/white-paper/akamai-designing-dns-for-availability-and-resilience-against-ddos-attacks.pdf
2. Akamai. 2021. Akamai Compliance Programs. akamai.com/us/en/about/compliance/ Akamai. 2021. Akamai Compliance Programs. akamai.com/us/en/about/compliance/
3. Mehmet Akcin. 2015. Comparing Root Server Performance Around the World. thousandeyes.com/blog/comparing-dns-root-server-performance Mehmet Akcin. 2015. Comparing Root Server Performance Around the World. thousandeyes.com/blog/comparing-dns-root-server-performance
4. On Eliminating Root Nameservers from the DNS