diff --git a/computer_graphics/README.md b/computer_graphics/README.md
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--- a/computer_graphics/README.md
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@@ -1,7 +1,7 @@
 ### Rendering
 * [An Improved Illumination Model for Shaded Display](https://www.cs.drexel.edu/~david/Classes/CS586/Papers/p343-whitted.pdf)
 
-* [The Rendering Equation](http://x86.cs.duke.edu/courses/cps124/fall09/notes/16_rendering/p143-kajiya.pdf)
+* [The Rendering Equation](http://www.cs.rpi.edu/~cutler/classes/advancedgraphics/S08/lectures/kajiya.pdf)
 * [GigaVoxels : Ray-Guided Streaming for Efficient and Detailed Voxel Rendering](http://maverick.inria.fr/Publications/2009/CNLE09/CNLE09.pdf) - [Web page](http://maverick.inria.fr/Publications/2009/CNLE09/) - [Project page](http://gigavoxels.imag.fr/) - [Video](https://www.youtube.com/watch?v=HScYuRhgEJw)
 
 ### Surface reconstruction