TY - Journal of Guizhou University of Finance and Economics A1 - YUE Feng-Li T1 - Y1 - 2010-09-15 JF - Journal of Guizhou University of Finance and Economics JO - Journal of Guizhou University of Finance and Economics SP - 25 EP - VL - 28 IS - 5 UR - https://gcxb.gufe.edu.cn N1 - ER -