@article{LI Cheng-Xun:106, author = {LI Cheng-Xun, CHEN Pi-Heng}, 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 = {106}, numpages = {0}, pages = {106}, keywords = {}, url = {https://gcxb.gufe.edu.cn/EN/abstract/article_8389.shtml}, doi = {} }