Grothoff, Christian and Wachs, Matthias and Wolf, Hellekin and Appelbaum, Jacob. Special-Use Domain Names of Peer-to-Peer Systems. Internet Engineering Task Force. 2014-03-03 [2012-07-03]. (原始内容存档于2019-12-15).
Grothoff, Christian and Wachs, Matthias and Wolf, Hellekin and Appelbaum, Jacob. Special-Use Domain Names of Peer-to-Peer Systems. Internet Engineering Task Force. 2015-01-24 [2015-10-31]. (原始内容存档于2020-02-10).
Grothoff, Christian and Wachs, Matthias and Wolf, Hellekin and Appelbaum, Jacob. Special-Use Domain Names of Peer-to-Peer Systems. Internet Engineering Task Force. 2014-03-03 [2012-07-03]. (原始内容存档于2019-12-15).
Grothoff, Christian and Wachs, Matthias and Wolf, Hellekin and Appelbaum, Jacob. Special-Use Domain Names of Peer-to-Peer Systems. Internet Engineering Task Force. 2015-01-24 [2015-10-31]. (原始内容存档于2020-02-10).