[1]Wenping Zheng,Xiaohui Lin,Yuansheng Yang,Chong Cui. On the crossing numbers of Km□Pn, Graphs and Combinatorics, 2007, 23(3):327-336.
[2]Yuhua Qian,Chuangyin Dang,Jiye Liang,Feng Wang,Wei Xu. Knowledge distance in information systems, Journal of System Science and System Engineering, 2007, 16(4):434-449. 点击阅览