1. Murphy was an optimist;Driscoll,2010
2. The network is reliable;Bailis,2014
3. Summary of windows azure service disruption on feb 29th, 2012;Laing,2012
4. Google, “App engine outage today.” https://groups.google.com/forum/?fromgroups=\#!topic/google-appengine/985VmzuLMDs (June 2008).
5. From byzantine generals to hackers;Lamport,2011