1. Contact with Alien Civilisations;Michaud,2007
2. Declaration of Principles Concerning Activities Following the Detection of Extraterrestrial Intelligence, ‘First SETI protocol’, IAA, 〈www.seti-inst.edu/post-detection.html〉; 〈http://www.seti.org/Page.aspx?pid=680; 2010 revision〉 〈http://www.setileague.org/iaaseti/protocols_rev2010.pdf〉, 1989 (accessed 9 September 2011).
3. Organising ourselves for contact;Michaud;Analog,1998
4. The diplomatic implications of discovering extraterrestrial intelligence;Goodman;Mercury,1987