--- ray/doc/ray.html	2011/07/15 17:47:33	1.16
+++ ray/doc/ray.html	2011/07/15 20:59:36	1.17
@@ -1897,8 +1897,10 @@ Ecole  Polytechnique  Federale de Lausanne (EPFL Unive
 <p>
 <ul>
     <li>Ward, G., R. Mistrick, E.S. Lee, A. McNeil, J. Jonsson,
-	&quot;Simulating the Daylight Performance of Complex Fenestration Systems
-	Using Bidirectional Scattering Distribution Functions within Radiance,&quot;
+	&quot;<a href="http://gaia.lbl.gov/btech/papers/4414.pdf">Simulating
+	the Daylight Performance of Complex Fenestration Systems
+	Using Bidirectional Scattering Distribution Functions within
+	Radiance</a>,&quot;
 	<em>Journal of the Illuminating Engineering Soc. of North America</em>,
 	April 2011.
     <li>Cater, Kirsten, Alan Chalmers, Greg Ward,