Alan Berube, Jesus Leal Trujillo, Tao Ran, and Joseph Parilla:Global Metro Monitor. In: Brookings. 22.Januar 2015 (brookings.edu[abgerufen am 19.Juli 2018]).
British Airways to cease Chengdu route - Business Traveller – The leading magazine for frequent flyers. In: Business Traveller – The leading magazine for frequent flyers. 17.Oktober 2016 (businesstraveller.com[abgerufen am 21.September 2017]).