@inproceedings{sgem2012s11v3001,
  title = {3D EVALUATION MODEL OF THE UNDERGROUND SPACE RESOURCES IN THE CENTRAL AREA OF BEIJING, CHINA},
  author = {Tian, Yi and Chen, Jian-ping},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference},
  year = {2012},
  pages = {345 - 352 pp},
  publisher = {Stef92 Technology},
  doi = {10.5593/sgem2012/s11.v3001}
}