@article{YUAN Ya-Lin:81, author = {YUAN Ya-Lin, KONG Rong}, title = {}, publisher = {Journal of Guizhou University of Finance and Economics}, year = {2010}, journal = {Journal of Guizhou University of Finance and Economics}, volume = {28}, number = {5}, eid = {81}, numpages = {0}, pages = {81}, keywords = {}, url = {https://gcxb.gufe.edu.cn/EN/abstract/article_8385.shtml}, doi = {} }