Submitted on: 04 June 1998.
Revised on: 15 June 1998.
Accepted on: 04 July 1998.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
Submitted on: 19 March 2015.
Revised on: 04 April 2015.
Accepted on: 23 April 2015.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
http://reply.papertrans.cn/3/236/23573/23573-33.png
Submitted on: 23 October 2019.
Revised on: 04 December 2019.
Accepted on: 29 December 2019.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
Submitted on: 17 January 2009.
Revised on: 01 February 2009.
Accepted on: 25 February 2009.
OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE
http://reply.papertrans.cn/3/236/23573/23573-36.png