diff --git a/README.md b/README.md
index e05b183..6465c86 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,13 @@
-# piwigo_scan
+# piwigo scan
+
+A collection of scripts to scan a file system folder for new images or videos which will be added to piwigo.
+
+Thumbnail are created during the scan to reduce loading times during browsing, where normally thumbnails would be created.
+
+# sources
+[Quick Sync](https://piwigo.org/ext/extension_view.php?eid=855)
+
+which is an extract of:
+
+[Piwigo Import Tree](http://piwigo.org/ext/extension_view.php?eid=606)
 
-A collection of scripts to scan a file system folder for new images or videos which will be added to piwigo.
-
-Thumbnail are created during the scan to reduce loading times during browsing, where normally thumbnails would be created.
\ No newline at end of file