diff --git a/possible search engines.md b/possible search engines.md
index 643a5e1..41f2bc0 100644
--- a/possible search engines.md	
+++ b/possible search engines.md	
@@ -1,4 +1,5 @@
-Here we can store sites, which could be useful as engine and waiting for an implementation.
+Here we can store sites, which could be useful as engine and waiting for an implementation.  
+Ideas of search engines can be found here : https://duckduckgo.com/bang.html
 
 ### General
 
@@ -63,4 +64,4 @@ Note: https://torrentz.eu/help#indexed show what torrent engines could be implem
 
 | site-url | api-doc (if available) | comments |
 | -------- | ---------------------- | -------- |
-| http://octopart.com | http://octopart.com/api/home | electronic parts|
+| http://octopart.com | http://octopart.com/api/home | electronic parts|
\ No newline at end of file