diff --git a/doc/arch-design/ch_references.xml b/doc/arch-design/ch_references.xml
index 98cd0e2356..b8015c1fe9 100644
--- a/doc/arch-design/ch_references.xml
+++ b/doc/arch-design/ch_references.xml
@@ -14,7 +14,7 @@
Depletion
+ xlink:href="http://www.internetsociety.org/deploy360/blog/2014/05/goodbye-ipv4-iana-starts-allocating-final-address-blocks/">Depletion
of IPv4 Addresses: describing how IPv4 addresses and the
migration to IPv6 is inevitable.
@@ -59,7 +59,7 @@
Nested
+ xlink:href="http://davejingtian.org/2014/03/30/nested-kvm-just-for-fun">Nested
KVM: Post on how to nest KVM under KVM.