Submitted on: 24 December 2004.
Revised on: 06 March 2005.
Accepted on: 24 April 2005.
___________________CLASSICAL AND QUANTUM GRAVITY---IOP PUBLISHING LTD
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Submitted on: 22 December 2008.
Revised on: 21 March 2009.
Accepted on: 08 May 2009.
___________________CLASSICAL AND QUANTUM GRAVITY---IOP PUBLISHING LTD
http://reply.papertrans.cn/1/55/5475/5475-24.png
Submitted on: 13 October 2018.
Revised on: 01 January 2019.
Accepted on: 13 February 2019.
___________________CLASSICAL AND QUANTUM GRAVITY---IOP PUBLISHING LTD
Submitted on: 13 July 2004.
Revised on: 10 August 2004.
Accepted on: 07 September 2004.
___________________CLASSICAL AND QUANTUM GRAVITY---IOP PUBLISHING LTD
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Submitted on: 24 July 2014.
Revised on: 14 August 2014.
Accepted on: 02 September 2014.
___________________CLASSICAL AND QUANTUM GRAVITY---IOP PUBLISHING LTD
Submitted on: 07 October 2024.
Revised on: 27 December 2024.
Accepted on: 28 January 2025.
___________________CLASSICAL AND QUANTUM GRAVITY---IOP PUBLISHING LTD
Submitted on: 22 January 2014.
Revised on: 22 April 2014.
Accepted on: 15 May 2014.
___________________CLASSICAL AND QUANTUM GRAVITY---IOP PUBLISHING LTD