--- trunk/doc/user/diffusion.tex	2006/03/24 08:40:50	659
+++ trunk/doc/user/diffusion.tex	2006/03/24 08:43:21	660
@@ -82,7 +82,7 @@
 In the following the upper index ${(n)}$ refers to a value at time $t^{(n)}$. The simplest
 and most robust scheme to approximate the time derivative of the the temperature is 
 the backward Euler
-\index{backward Euler} scheme, see~\cite{XXX} for alternatives. The backward Euler 
+\index{backward Euler} scheme. The backward Euler 
 scheme is based
 on the Taylor expansion of $T$ at time $t^{(n)}$:
 \begin{equation}