@article{KoenigZhenHelmingetal.2014,
  author    = {H. J. Koenig and L. Zhen and K. Helming and S. Uthes and L. Yang and Xianyong Cao and Hubert Wiggering},
  title     = {Assessing the impact of the sloping land conversion programme on rural sustainability in Guyuan, Western China},
  journal   = {Land degradation \& development},
  volume    = {25},
  number    = {4},
  pages     = {385 -- 396},
  doi       = {10.1002/ldr.2164},
  year      = {2014},
}