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Submitted on: 22 September 2014.
Revised on: 09 December 2014.
Accepted on: 14 January 2015.
___________________Evolving Systems---SPRINGER HEIDELBERG
Submitted on: 23 July 2007.
Revised on: 10 October 2007.
Accepted on: 29 October 2007.
___________________Evolving Systems---SPRINGER HEIDELBERG
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Submitted on: 05 January 2022.
Revised on: 28 March 2022.
Accepted on: 10 May 2022.
___________________Evolving Systems---SPRINGER HEIDELBERG
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http://reply.papertrans.cn/1/95/9473/9473-27.png
Submitted on: 06 February 2008.
Revised on: 18 April 2008.
Accepted on: 05 May 2008.
___________________Evolving Systems---SPRINGER HEIDELBERG
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Submitted on: 05 March 2017.
Revised on: 12 April 2017.
Accepted on: 05 June 2017.
___________________Evolving Systems---SPRINGER HEIDELBERG