cite GoF for Observer pattern

[skm-ma-ws1314.git] / sec-xmpp.tex

diff --git a/sec-xmpp.tex b/sec-xmpp.tex
index d3ecf61..213f3c2 100644 (file)
--- a/sec-xmpp.tex
+++ b/sec-xmpp.tex
@@ -95,7 +95,7 @@ and several ``away'' or ``do not disturb'' states), a user needs to subscribe to
 the other user's status. The mechanism behind this is called
 \term{Publish-Subscribe} and is specified in XEP-0060~\cite{xep0060}. It can
 be used to notify interested users about changes in personal information, and
-implements the well-known Observer pattern.
+implements the well-known Observer pattern~\cite{GOF95}.
 
 A user publishes information by creating a \term{node} on the XMPP server, which
 acts as a handle for the data. Interested users can then query the server for