1. Alloy solver. http://alloy.mit.edu/alloy; visited February 2016. Alloy solver. http://alloy.mit.edu/alloy; visited February 2016.
2. Erlang User's Guide. Time and time correction in Erlang. http://erlang.org/doc/apps/erts/time_correction.html; visited February 2016. Erlang User's Guide. Time and time correction in Erlang. http://erlang.org/doc/apps/erts/time_correction.html; visited February 2016.
3. PropEr testing of generic servers. http://proper.softlab.ntua.gr/Tutorials/PropEr_testing_of_generic_servers.html; visited February 2016. PropEr testing of generic servers. http://proper.softlab.ntua.gr/Tutorials/PropEr_testing_of_generic_servers.html; visited February 2016.
4. Boom analytics