--- a/text/ncat.tex	Wed Oct 28 21:18:55 2009 +0000
+++ b/text/ncat.tex	Wed Oct 28 21:41:53 2009 +0000
@@ -39,7 +39,7 @@
 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.)
-Still other definitions \nn{need refs for all these; maybe the Leinster book}
+Still other definitions \nn{need refs for all these; maybe the Leinster book \cite{MR2094071}}
 model the $k$-morphisms on more complicated combinatorial polyhedra.
 
 We will allow our $k$-morphisms to have any shape, so long as it is homeomorphic to