--- a/pnas/pnas.tex	Fri May 06 16:04:22 2011 -0700
+++ b/pnas/pnas.tex	Fri May 06 16:52:59 2011 -0700
@@ -392,7 +392,7 @@
 the TQFT invariant $A(Y)$ of a closed $k$-manifold $Y$ is a linear $(n{-}k)$-category.
 If $Y$ has boundary then $A(Y)$ is a collection of $(n{-}k)$-categories which afford
 a representation of the $(n{-}k{+}1)$-category $A(\bd Y)$.
-(See \cite{1009.5025} and \cite{kw:tqft};
+(See \cite{1009.5025} and references therein;
 for a more homotopy-theoretic point of view see \cite{0905.0465}.)
 
 We now comment on some particular values of $k$ above.