1. Teal group predicts worldwide UAV market will total $89 billion in its 2012 UAV market profile and forecast 2012 http://tealgroup.com/index.php/about-teal/teal-group-in-the-media/3/79-teal-group-predicts-worldwide-uav-market-will-total-89-billion-in-its-2012-uav-market-profile-and-forecast
2. Federal aviation regulations 2010 http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr&tpl=/ecfrbrowse/