--- ray/doc/ray.1	2011/06/22 00:13:25	1.21
+++ ray/doc/ray.1	2011/10/27 00:51:29	1.25
@@ -1,6 +1,6 @@
 .\" RCSid "$Id"
 .\" Print using the -ms macro package
-.DA 2/17/2011
+.DA 10/26/2011
 .LP
 .tl """Copyright \(co 2011 Regents, University of California
 .sp 2
@@ -1551,6 +1551,13 @@ the Ecole Polytechnique Federale de Lausanne (EPFL Uni
 in Lausanne, Switzerland.
 .NH 1
 References
+.LP
+Ward, G., R. Mistrick, E.S. Lee, A. McNeil, J. Jonsson,
+``Simulating the Daylight Performance of Complex Fenestration Systems
+Using Bidirectional Scattering Distribution Functions within Radiance,''
+.I "Leukos",
+7(4),
+April 2011.
 .LP
 Cater, K., A. Chalmers, G. Ward,
 ``Detail to Attention: Exploiting Visual Tasks for Selective Rendering,''