https://foreignpolicy.com/2013/05/02/the-contract-airlines-that-quietly-move-u-s-troops-and-spies-around-the-globe/

https://www.linkedin.com/pulse/20140829173243-29817943-details-of-covert-cia-airlines-described-by-head-of-the-airline-chapter-in-book-defrauding-america

https://www.wired.com/2011/06/legendary-cia-airline-in-danger-of-crashing/

https://www.robertnovell.com/evergreens-b-17-the-cia-and-operation-coldfeet-september-30-2017/

https://www.constantinereport.com/evergreen-international-aviation-inc-s-ties-to-the-cia-terrorism-and-fox-news-sourcewatch/

https://bbsradio.com/cgi-bin/webbbs/webbbs_config.pl?md=read;id=12421