1. Nation-state routing: censorship, wiretapping, and BGP;Karlin,2009
2. Schengen routing, https://en.wikipedia.org/wiki/Schengen_Routing.
3. Schengen Routing: A Compliance Analysis;D”onni,2015
4. Internet surveillance and boomerang routing: a call for Canadian network sovereignty;Obar;SSRN Electron. J.,2013
5. Geographic properties of internet routing;Subramanian,2002