About this article
Article Category: Research Article
Published Online: Dec 30, 2015
Page range: 233 - 249
Received: Oct 30, 2014
Accepted: Mar 16, 2015
DOI: https://doi.org/10.1515/cdc-2015-0013
Keywords
©2015 by Liu Ling, published by De Gruyter Open
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Ling, Liu