Tài liệu tham khảo WikiPedia: Gulfstream X-54 http://www.bizjournals.com/atlanta/stories/2005/12... http://www.compositesworld.com/articles/beyond-the... http://www.flightglobal.com/articles/2008/11/10/31... http://www.janes.com/articles/Janes-All-the-Worlds... http://www.designation-systems.net/usmilav/412015-... http://www.aopa.org/aircraft/articles/2008/081006g...
