@misc {IOPORT.70978751,
    author       = {Han, Yun-Ping and Liu, Pei-Sheng},
    title        = {The simulation of natural scenery based on objectarx},
    howpublished = {IITSI, 74-76 (2009).},
    year         = {2009},
    identifier   = {70978751},
}