--- a/cws/cw03.tex	Sat Nov 07 00:07:28 2020 +0000
+++ b/cws/cw03.tex	Thu Nov 12 12:18:51 2020 +0000
@@ -55,7 +55,7 @@
 list, of \emph{tokens} generated by the tokenizer from the previous
 coursework. For this you might want to filter out whitespaces and
 comments. Your parser should be able to handle the WHILE programs in
-Figures~\ref{fib}, \ref{loop} and \ref{primes}.  In addition give the
+Figures~\ref{fib} -- \ref{collatz}.  In addition give the
 parse tree for the statement:
 
 \begin{lstlisting}[language=While,numbers=none]