Dong Li 0013 Jinghui Xie Dongdong Weng Yuqian Li 87-88 2013 VR https://doi.org/10.1109/VR.2013.6549376 https://doi.ieeecomputersociety.org/10.1109/VR.2013.6549376 conf/vr/2013 db/conf/vr/vr2013.html#LiXWL13