http://reply.papertrans.cn/3/237/23640/23640-31.png
http://reply.papertrans.cn/3/237/23640/23640-32.png
Submitted on: 03 January 2011.
Revised on: 26 January 2011.
Accepted on: 19 February 2011.
Open Engineering---DE GRUYTER POLAND SP Z O O
http://reply.papertrans.cn/3/237/23640/23640-34.png
Submitted on: 28 March 1999.
Revised on: 18 April 1999.
Accepted on: 16 May 1999.
Open Engineering---DE GRUYTER POLAND SP Z O O
Submitted on: 04 February 2011.
Revised on: 22 February 2011.
Accepted on: 22 March 2011.
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