Doc links fix

docs/guide/output-theming.md

@@ -8,7 +8,7 @@ when rendered. A single application may use multiple themes and each may provide
 time only one theme can be active.
 
 > Note: Themes usually do not meant to be redistributed since views are too application specific. If you want to
-  redistribute customized look and feel consider CSS and JavaScript files in form of [asset bundles](assets.md) instead.
+  redistribute customized look and feel consider CSS and JavaScript files in form of [asset bundles](structure-assets.md) instead.
 
 Configuring a theme
 -------------------

docs/guide/tutorial-performance-tuning.md

@@ -85,7 +85,7 @@ Note that the `cache` [application component](structure-application-components.m
 It is possible to combine and minimize assets, typically JavaScript and CSS, in order to slightly improve page load
 time and therefore deliver better experience for end user of your application.
 
-In order to learn how it can be achieved, refer to [assets](assets.md) guide section.
+In order to learn how it can be achieved, refer to [assets](structure-assets.md) guide section.
 
 ### Using better storage for sessions