# HG changeset patch
# User Kevin Walker <kevin@canyon23.net>
# Date 1294432905 28800
# Node ID 240e4abfb405ac76aa5edeb30f13848fc31a91aa
# Parent  5f22b4501e5fd518db7615dcd1175e1d99528fd9
add citation to R. Brown and U. Tillman

diff -r 5f22b4501e5f -r 240e4abfb405 text/ncat.tex
--- a/text/ncat.tex	Fri Jan 07 09:08:15 2011 -0800
+++ b/text/ncat.tex	Fri Jan 07 12:41:45 2011 -0800
@@ -35,7 +35,7 @@
 Other definitions have a separate set of 1-morphisms for each interval $[0,l] \sub \r$, 
 a separate set of 2-morphisms for each rectangle $[0,l_1]\times [0,l_2] \sub \r^2$,
 and so on.
-(This allows for strict associativity.)
+(This allows for strict associativity; see \cite{ulrike-tillmann-2008,0909.2212}.)
 Still other definitions (see, for example, \cite{MR2094071})
 model the $k$-morphisms on more complicated combinatorial polyhedra.