Kopittke, Peter M.; Menzies, Neal W. (2007). "A Review of the Use of the Basic Cation Saturation Ratio and the "Ideal" Soil". Soil Science Society of America Journal. 71 (2): 259. Bibcode:2007SSASJ..71..259K. doi:10.2136/sssaj2006.0186.
Kopittke, Peter M.; Menzies, Neal W. (2007). "A Review of the Use of the Basic Cation Saturation Ratio and the "Ideal" Soil". Soil Science Society of America Journal. 71 (2): 259. Bibcode:2007SSASJ..71..259K. doi:10.2136/sssaj2006.0186.