--- a/slides/slides01.tex	Fri Apr 10 16:30:52 2020 +0100
+++ b/slides/slides01.tex	Thu Apr 16 19:15:46 2020 +0100
@@ -18,6 +18,9 @@
 % beamer stuff 
 \renewcommand{\slidecaption}{CFL 01, King's College London}
 
+%% https://cs.rit.edu/~hh/teaching/_media/cc18/lectures/lect1/main.pdf
+%% https://cs.rit.edu/~hh/teaching/_media/cc18/lectures/lect2/main.pdf
+%% https://cs.rit.edu/~hh/teaching/_media/cc18/lectures/lect3/main.pdf
 
 \begin{document}