Submitted on: 10 December 2008.
Revised on: 23 January 2009.
Accepted on: 16 February 2009.
___________________International Journal of Sustainable Aviation
http://reply.papertrans.cn/2/142/14189/14189-12.png
http://reply.papertrans.cn/2/142/14189/14189-13.png
Submitted on: 03 February 2017.
Revised on: 24 March 2017.
Accepted on: 21 April 2017.
___________________International Journal of Sustainable Aviation
Submitted on: 05 July 2009.
Revised on: 21 September 2009.
Accepted on: 10 October 2009.
___________________International Journal of Sustainable Aviation
Submitted on: 24 May 2010.
Revised on: 02 September 2010.
Accepted on: 16 October 2010.
___________________International Journal of Sustainable Aviation
Submitted on: 03 January 2017.
Revised on: 01 May 2017.
Accepted on: 30 May 2017.
___________________International Journal of Sustainable Aviation
http://reply.papertrans.cn/2/142/14189/14189-18.png
Submitted on: 22 June 1998.
Revised on: 03 August 1998.
Accepted on: 15 September 1998.
___________________International Journal of Sustainable Aviation
http://reply.papertrans.cn/2/142/14189/14189-20.png