1. Air Transport Association of America, 2007. Economic Report. The ATA. .
2. Inside delta’s low-fare strategy;Baggaley;Business Week,2005
3. Deregulating the Airlines;Bailey,1985
4. Higher airfares to small and medium sized communities – costly service or market power?;Bitzan;Journal of Transport Economics and Policy,2006
5. Hubs and high fares: dominance and market power in the U.S. airline industry;Borenstein;Rand Journal of Economics,1989