diff --git a/docs/content/tutorial/step_07.ngdoc b/docs/content/tutorial/step_07.ngdoc
index 8ccc1502..5906e23f 100644
--- a/docs/content/tutorial/step_07.ngdoc
+++ b/docs/content/tutorial/step_07.ngdoc
@@ -98,6 +98,9 @@ of configuring the injector. As opposed to AMD or require.js modules, Angular mo
 solve the problem of script load ordering or lazy script fetching. These goals are totally independent and
 both module systems can live side by side and fulfil their goals.
 
+For deepen your understanding of DI on Angular, see
+[Understanding Dependency Injection](https://github.com/angular/angular.js/wiki/Understanding-Dependency-Injection).
+
 ## Template
 
 The `$route` service is usually used in conjunction with the {@link ngRoute.directive:ngView