D Ashford, February 2007, "New Commercial Opportunities in Space", The Aeronautical Journal
, February 2007. Paper No. 3102. Manuscript received 31 May 2006, revised 24 October 2006 accepted 29 January 2007. This is the latest in a series of invited survey papers focusing on a specific aspect of the aerospace industry..
Also downloadable from http://www.spacefuture.com/archive/new opportunities in commercial space.shtml