--- a/doc/kishna.tex	Mon Dec 08 22:37:27 2008 +0000
+++ b/doc/kishna.tex	Mon Dec 08 22:51:19 2008 +0000
@@ -188,6 +188,7 @@
 \bibitem{gaffer} Gaffer on games. Game
   Physics. 2006. http://gafferongames.wordpress.com/game-physics/
   (read: 2008-12-08)
+\bibitem{fractal} Terrain texture generation.  http://www.gameprogrammer.com/fractal.html
 \end{thebibliography}
 
 \end{document}