Submitted on: 18 August 2001.
Revised on: 08 December 2001.
Accepted on: 26 January 2002.
___________________Decision Science Letters---GROWING SCIENCE
Submitted on: 11 August 2020.
Revised on: 22 November 2020.
Accepted on: 29 December 2020.
___________________Decision Science Letters---GROWING SCIENCE
Submitted on: 15 May 2015.
Revised on: 30 August 2015.
Accepted on: 13 September 2015.
___________________Decision Science Letters---GROWING SCIENCE
http://reply.papertrans.cn/1/73/7226/7226-14.png
Submitted on: 24 May 1998.
Revised on: 02 August 1998.
Accepted on: 08 September 1998.
___________________Decision Science Letters---GROWING SCIENCE
http://reply.papertrans.cn/1/73/7226/7226-16.png
Submitted on: 07 January 2014.
Revised on: 27 February 2014.
Accepted on: 25 April 2014.
___________________Decision Science Letters---GROWING SCIENCE
http://reply.papertrans.cn/1/73/7226/7226-18.png
Submitted on: 18 January 2000.
Revised on: 13 February 2000.
Accepted on: 09 March 2000.
___________________Decision Science Letters---GROWING SCIENCE
http://reply.papertrans.cn/1/73/7226/7226-20.png