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-rw-r--r--buch/common/test-common.tex1
1 files changed, 1 insertions, 0 deletions
diff --git a/buch/common/test-common.tex b/buch/common/test-common.tex
index 289e59c..3f49701 100644
--- a/buch/common/test-common.tex
+++ b/buch/common/test-common.tex
@@ -30,6 +30,7 @@
\usepackage{standalone}
\usepackage{environ}
\usepackage{tikz}
+\usepackage{xr}
\input{../common/linsys.tex}
\newcounter{beispiel}
\newenvironment{beispiele}{