diff --git a/Install_Configure_ElasticSearch.md b/Install_Configure_ElasticSearch.md
index c9221cb..1043fa3 100644
--- a/Install_Configure_ElasticSearch.md
+++ b/Install_Configure_ElasticSearch.md
@@ -103,6 +103,8 @@ $ curl  -H 'Content-Type: application/json' -X PUT http://localhost:9200/gn-sear
 Access Elasticsearch admin page from http://localhost:9200/
 
 # Step 6 - Configure connect
+see also https://geonetwork-opensource.org/manuals/3.10.x/en/install-guide/installing-index.html
+
 Update Elasticsearch URL in 'WEB-INF/config.properties':
 ```
 sudo nano work/jetty-0_0_0_0-8080-geonetwork_war-_geonetwork-any-/webapp/WEB-INF/config.properties