diff --git a/ExistingProjects/ERP5.mdwn b/ExistingProjects/ERP5.mdwn
index 79bcb3b7e8a9dc9f939fec3fbf589102e67b5a05..d7629b8a01ef8a66551c8c4ceee4deaa12725ecd 100644
--- a/ExistingProjects/ERP5.mdwn
+++ b/ExistingProjects/ERP5.mdwn
@@ -20,7 +20,7 @@
### Positive
-- Flexible system based on a good architecture(Unified Business Model)
+- Flexible system based on a good architecture([Unified Business Model](http://www.erp5.org/UnifiedBusinessModel))
- Highly configurable/customizable
- i18n/l10n support
- Rapid application development through the web(easy to do prototyping)
@@ -28,7 +28,7 @@
### Negative
- Community: The mailing lists are not very active, see ,
-- Take time to study(important to understand its design(Unified Business Model))
+- Take time to study(important to understand its design([Unified Business Model](http://www.erp5.org/UnifiedBusinessModel)))
- Installation is not simple
- Need to read source code and need some experience.