diff --git a/HowtoOpenBSD/OpenBGPD.md b/HowtoOpenBSD/OpenBGPD.md
index a55bfea0..d8b62b81 100644
--- a/HowtoOpenBSD/OpenBGPD.md
+++ b/HowtoOpenBSD/OpenBGPD.md
@@ -18,6 +18,7 @@ On peut faire tourner un routeur BGP sous BSD (OpenBGPD), Linux (Quagga), Cisco,
 * <http://www.falz.net/tech/openbgpd>
 * <http://www.ris.ripe.net/cgi-bin/lg/index.cgi>
 * <http://www.ripe.net/data-tools/stats/ris>
+* <http://thomas.mangin.com/data/pdf/SYSADMIN%204%20-%20Mangin%20-%20BGP%20for%20sysadmin.pdf>
 
 ## Configuration