1. BGP flowspec. https://archive.nanog.org/sites/default/files/wed.general.trafficdiversion.serodio.10.pdf
2. DDoS attack frequency grows 40%, low volume attacks dominate. https://www.helpnetsecurity.com/2018/09/13/ddos-attack-frequency-grows/
3. Euro IX- internet exchange points. https://www.euro-ix.net/media/filer_public/d5/84/d584495f-b8ae-4f24-b589-7b9efed3594b/ixp_report_2018-2019-final.pdf
4. European internet exchange association 2012 report on European IXPs. https://www.euro-ix.net/documents/1117-Euro-IX-IXP-Report-2012-pdf
5. Internet2: Regional research and education networks. https://internet2.edu/network/state-and-regional-r-e-networks/