http://reply.papertrans.cn/2/111/11005/11005-31.png
http://reply.papertrans.cn/2/111/11005/11005-32.png
http://reply.papertrans.cn/2/111/11005/11005-33.png
Submitted on: 25 July 2019.
Revised on: 24 August 2019.
Accepted on: 11 October 2019.
___________________HABITAT INTERNATIONAL---PERGAMON-ELSEVIER SCIENCE LTD
http://reply.papertrans.cn/2/111/11005/11005-35.png
Submitted on: 01 January 2004.
Revised on: 21 April 2004.
Accepted on: 20 May 2004.
___________________HABITAT INTERNATIONAL---PERGAMON-ELSEVIER SCIENCE LTD