Submitted on: 13 March 2016.
Revised on: 25 June 2016.
Accepted on: 25 July 2016.
___________________Global Environment---WHITE HORSE PRESS
Submitted on: 16 January 2000.
Revised on: 29 February 2000.
Accepted on: 16 April 2000.
___________________Global Environment---WHITE HORSE PRESS
Submitted on: 21 October 2012.
Revised on: 25 January 2013.
Accepted on: 14 February 2013.
___________________Global Environment---WHITE HORSE PRESS
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Submitted on: 02 November 2018.
Revised on: 13 February 2019.
Accepted on: 28 February 2019.
___________________Global Environment---WHITE HORSE PRESS
Submitted on: 31 July 2015.
Revised on: 01 September 2015.
Accepted on: 30 September 2015.
___________________Global Environment---WHITE HORSE PRESS
Submitted on: 19 February 2007.
Revised on: 16 April 2007.
Accepted on: 29 May 2007.
___________________Global Environment---WHITE HORSE PRESS
http://reply.papertrans.cn/2/109/10815/10815-28.png
Submitted on: 25 November 1999.
Revised on: 16 December 1999.
Accepted on: 29 December 1999.
___________________Global Environment---WHITE HORSE PRESS
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