1. Air Transport Association, 2001a. ATA Reports Record Decline in September Passenger Traffic. Press release. 10/15/2001.
2. Air Transport Association, 2001b. October Passenger Traffic Down 23 Percent. Press release. 11/15/2001.
3. Air Transport Association, 2001c. Passenger Traffic Down 20 Percent in November. Press release. 12/18/2001.
4. Air Transport Association, 2001d. Passenger Traffic Down 14 Percent in December. Press release. 1/17/2002.
5. How to fix the airlines. The troubled industry needs a model that work. Here is a blueprint;Arndt;Business Week,2003