diff --git a/articles/Wiener filter - Wikipedia/Wiener filter - Wikipedia.xopp.xml b/articles/Wiener filter - Wikipedia/Wiener filter - Wikipedia.xopp.xml
index 3501e29..79caa93 100644
--- a/articles/Wiener filter - Wikipedia/Wiener filter - Wikipedia.xopp.xml
+++ b/articles/Wiener filter - Wikipedia/Wiener filter - Wikipedia.xopp.xml
@@ -14,6 +14,37 @@
?
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