http://reply.papertrans.cn/2/152/15192/15192-11.png
http://reply.papertrans.cn/2/152/15192/15192-12.png
http://reply.papertrans.cn/2/152/15192/15192-13.png
Submitted on: 31 March 2006.
Revised on: 25 May 2006.
Accepted on: 15 June 2006.
___________________JOURNAL OF AIR TRANSPORT MANAGEMENT
http://reply.papertrans.cn/2/152/15192/15192-15.png
http://reply.papertrans.cn/2/152/15192/15192-16.png
Submitted on: 28 May 2000.
Revised on: 26 June 2000.
Accepted on: 22 August 2000.
___________________JOURNAL OF AIR TRANSPORT MANAGEMENT
Submitted on: 20 April 2003.
Revised on: 20 June 2003.
Accepted on: 09 July 2003.
___________________JOURNAL OF AIR TRANSPORT MANAGEMENT
http://reply.papertrans.cn/2/152/15192/15192-19.png
Submitted on: 18 April 2014.
Revised on: 20 June 2014.
Accepted on: 22 July 2014.
___________________JOURNAL OF AIR TRANSPORT MANAGEMENT