1. Development and chemical properties of Ultisols in East Kalimantan as determined by charge characteristics;Anda;Agrivita,2001
2. Anda, M., 2006. Improvement of charge characteristics of Oxisols using basalt and rice husk compost for cocoa growth. PhD thesis, Faculty of Agriculture, Universiti Putra Malaysia, Malaysia.
3. Point of zero charge determination in soils and minerals via traditional methods and detection of electroacoustic mobility;Appel;Geoderma,2003
4. Interaction between organic compounds, minerals, and ions in volcanic ash-derived soils: adsorption of benzoate, p-OH benzoate, salicylate, and phthalate ions;Appelt;Soil Sci. Soc. Am. Proc.,1975
5. Aluminum;Barnhisel,1982