--- a/handouts/ho08.tex	Sun Mar 01 00:11:13 2015 +0000
+++ b/handouts/ho08.tex	Fri Apr 17 11:49:10 2015 +0100
@@ -866,3 +866,6 @@
 
 Jeffrey Robinson
 Bitcon: The Naked Truth about Bitcoin
+
+The Bitcoin Backbone Protocol: Analysis and Applications
+https://eprint.iacr.org/2014/765.pdf