Ziqian Liu Bradley Huffaker Marina Fomenkov Nevil Brownlee Kimberly C. Claffy Two Days in the Life of the DNS Anycast Root Servers. 125-134 2007 conf/pam/2007 PAM http://dx.doi.org/10.1007/978-3-540-71617-4_13 db/conf/pam/pam2007.html#LiuHFBC07