Submitted on: 07 September 2003.
Revised on: 01 October 2003.
Accepted on: 11 October 2003.
Opsearch---SPRINGER INDIA
Submitted on: 27 July 2005.
Revised on: 19 August 2005.
Accepted on: 10 September 2005.
Opsearch---SPRINGER INDIA
Submitted on: 03 June 2019.
Revised on: 24 June 2019.
Accepted on: 19 July 2019.
Opsearch
http://reply.papertrans.cn/3/238/23701/23701-24.png
http://reply.papertrans.cn/3/238/23701/23701-25.png
Submitted on: 13 April 2023.
Revised on: 13 May 2023.
Accepted on: 09 June 2023.
Opsearch
http://reply.papertrans.cn/3/238/23701/23701-27.png
Submitted on: 19 December 2013.
Revised on: 05 January 2014.
Accepted on: 15 January 2014.
Opsearch
http://reply.papertrans.cn/3/238/23701/23701-29.png
http://reply.papertrans.cn/3/238/23701/23701-30.png