# HG changeset patch
# User Robert McIntyre <rlm@mit.edu>
# Date 1328425320 25200
# Node ID 3883580e9d28dfaa544afb52edbb38ed94abeae6
# Parent  ac158a976443ace7ed909a0d3463969d47bee32f
changed link

diff -r ac158a976443 -r 3883580e9d28 org/intro.org
--- a/org/intro.org	Sat Feb 04 23:45:25 2012 -0700
+++ b/org/intro.org	Sun Feb 05 00:02:00 2012 -0700
@@ -125,7 +125,7 @@
 ago, and as a result it has been ported and modified for many
 different reasons. This engine was famous for its advanced use of
 realistic shading and had decent and fast physics
-simulation. Researchers at Princeton [[http://www.nature.com/nature/journal/v461/n7266/pdf/nature08499.pdf][used this code]] to study spatial
+simulation. Researchers at Princeton [[../sources/mouse-in-virtual-reality.pdf][used this code]] to study spatial
 information encoding in the hippocampal cells of rats. Those
 researchers created a special Quake II level that simulated a maze,
 and added an interface where a mouse could run around inside a ball in