9Zhao Y C,Shi X Z,Yu D S,et al.Uncertainty assessment of spatial patterns of soil organic carbon density using sequential indicator simulation,a case study of Hebei province,China[J].Chemosphere,2005,59 (11):1527-1535.
10Goovaerts P.Geostatistical modeling of uncertainty in soil science[J].Geoderma,2001,103:3-26.