9He Y Q, Zuo W R, Lao G H, et al. Mechanism of the coal nature prediction system and its application in Fengfeng coal field of China [ A]. Proceedings Twenty -Fourth Pittsburgh Coal Conference [C]. South Africa: 24th Annual International Pittsburgh Coal Conference, Johannesburg, 2007. 10 - 14, CD - ROM : Session 30 - 5.
10James R. Carr. On Visualization for Assessing Kriging Outcomes[J] 2002,Mathematical Geology(4):421～433
