diff --git a/ChainOfResponsibilities/ChainOfResponsibilities.php b/ChainOfResponsibilities/ChainOfResponsibilities.php
index d8639fc..82ba06e 100644
--- a/ChainOfResponsibilities/ChainOfResponsibilities.php
+++ b/ChainOfResponsibilities/ChainOfResponsibilities.php
@@ -12,6 +12,8 @@ namespace DesignPatterns;
  * Examples:
  * - Caching: first object is an instance of e.g. a Memcached Interface, if that "misses" it delegates the call to the
  *   Database Interface
+ * - Yii Framework: CFilterChain is a chain of controller action filters. the executing point is passed from one filter
+ *   to the next along the chain, and only if all filters say "yes", the action can be invoked at last.
  *
  */
 
diff --git a/FluentInterface/FluentInterface.php b/FluentInterface/FluentInterface.php
index 8d2fff2..c7a7e7a 100644
--- a/FluentInterface/FluentInterface.php
+++ b/FluentInterface/FluentInterface.php
@@ -11,6 +11,7 @@ namespace DesignPatterns;
  * Examples:
  * - Doctrine2's QueryBuilder works something like that example class below
  * - PHPUnit uses fluent interfaces to build mock objects
+ * - Yii Framework: CDbCommand and CActiveRecord use this pattern too
  *
  */
 class SQL
diff --git a/Registry/Registry.php b/Registry/Registry.php
index 3c79725..0fb4698 100644
--- a/Registry/Registry.php
+++ b/Registry/Registry.php
@@ -11,6 +11,7 @@ namespace DesignPatterns;
  *
  * Example:
  * - Zend Framework: Zend_Registry holds the application's logger object, front controller etc.
+ * - Yii Framework: CWebApplication holds all the application components, such as CWebUser, CUrlManager, etc.
  *
  */