--- ray/doc/ray.1	2011/10/27 00:51:29	1.25
+++ ray/doc/ray.1	2014/07/31 18:32:41	1.26
@@ -1,8 +1,8 @@
-.\" RCSid "$Id"
+.\" RCSid "$Id: ray.1,v 1.26 2014/07/31 18:32:41 greg Exp $"
 .\" Print using the -ms macro package
-.DA 10/26/2011
+.DA 07/31/2014
 .LP
-.tl """Copyright \(co 2011 Regents, University of California
+.tl """Copyright \(co 2014 Regents, University of California
 .sp 2
 .TL
 The
@@ -1551,6 +1551,13 @@ the Ecole Polytechnique Federale de Lausanne (EPFL Uni
 in Lausanne, Switzerland.
 .NH 1
 References
+.LP
+McNeil, A., C.J. Jonsson, D. Appelfeld, G. Ward, E.S. Lee,
+``A validation of a ray-tracing tool used to generate
+bi-directional scattering distribution functions for
+complex fenestration systems,''
+.I "Solar Energy",
+98, 404-14, November 2013.
 .LP
 Ward, G., R. Mistrick, E.S. Lee, A. McNeil, J. Jonsson,
 ``Simulating the Daylight Performance of Complex Fenestration Systems