rfc20.txt:Vint Cerf:ucla:usa:9:oct:1969:16:pdf,figure:draft-ietf-ippm-delay-var-as:2009-01-22:2008-12-19:1:0:15:22:38:1:2006-10-17:490:draft-morton-ippm-delay-var-as:2008-02-17:302:2009-03-05:43