http://reply.papertrans.cn/1/92/9173/9173-31.png
Submitted on: 07 December 2004.
Revised on: 28 January 2005.
Accepted on: 12 February 2005.
___________________European Journal of Industrial Engineering
http://reply.papertrans.cn/1/92/9173/9173-33.png
Submitted on: 16 August 2011.
Revised on: 14 November 2011.
Accepted on: 12 December 2011.
___________________European Journal of Industrial Engineering
http://reply.papertrans.cn/1/92/9173/9173-35.png
http://reply.papertrans.cn/1/92/9173/9173-36.png