diff --git a/ExistingProjects/ERP5.mdwn b/ExistingProjects/ERP5.mdwn
index 5c9243371e5063bb87e944e3db67c4c2df77629c..988d55f6b18c200497418600cf7ea5e111425e1a 100644
--- a/ExistingProjects/ERP5.mdwn
+++ b/ExistingProjects/ERP5.mdwn
@@ -6,6 +6,8 @@
 * <http://www.osoe-project.org/web_page_module/3278> - How to install and use the ERP5 VM
 * <http://www.osoe-project.org/lesson/osoe-Lecture.ERP.Configuration.Introduction> - Online Lectures including accounting.
 * <http://www.erp5.com/documentation/user> - Other user documents.
+* <http://www.osoe-project.org/lesson/osoe-Lecture.ERP.Configuration.Introduction/P-OSOE-Accounting.Mathematician/view> - Accounting for Mathematicians
+
 
 ## Technical