| Research on the effects of land use change on ecosystem services value of Loess Plateau - a case study of Longxi County | 0 | 0.34 | 2005 |
| Study on circular economy development pattern of eco-gragibility region in loess plateau - a case study of Longxi county in Gansu Province. | 0 | 0.34 | 2005 |
| Research on land use/cover change of hilly and gully area in the Loess Plateau. | 1 | 0.38 | 2004 |
