Y. Hashimoto, H. Matsufuru, M. Takaoka, H. Tanida and T. Sato, “Impacts of Chemical Amendment and Plant Growth on Lead Speciation and Enzyme Activities in a Shooting Range Soil: An X-Ray Absorption Fine Structure Investigation,” Journal of Environmental Quality, Vol. 38, No. 4, 2009, pp. 1420-1428.
 Q. L. Wang, L. Luo, Y. B. Ma, D. P. Wei and L. Hua, “In Situ Immobilization Remediation of Heavy Metals-Contaminated Soils: A Review,” Chinese Journal of Applied Ecology, Vol. 20, No. 5, 2009, pp. 1214-1222.
 P. K. Padmavathiamma and L. Y. Li, “Phytoavailability and Fractionation of Lead and Manganese in a Contaminated Soil after Application of Three Amendments,” Bioresource Technology, Vol. 101, No. 14, 2010, pp. 5667-5676.
 D. Houben, J. Pircar and P. Sonnet, “Heavy Metal Immobilization by Cost-Effective Amendments in a Contaminated Soil: Effects on Metal Leaching and Phyto-Availability,” Journal of Geochemical Exploration, Vol. 123, 2012, pp. 87-94. doi:10.1016/j.gexplo.2011.10.004
 S. Chen, M. Xu, Y. Ma and J. Yang, “Evaluation of Different Phosphate Amendments on Availability of Metals in Contaminated Soil,” Ecotoxicology and Environmental Safety, Vol. 67, No. 2, 2007, pp. 278-285.
 S. B. Chen, Y. G. Zhu and Y. B. Ma, “The Effect of Grain Size of Rock Phosphate Amendment on Metal Immobilization in Contaminated Soils,” Journal of Hazardous Materials, Vol. 134, No. 1-3, 2006, pp. 74-79.
 X. Cao, A. Wahbi, L. Ma, B. Li and Y. Yang, “Immobilization of Zn, Cu and Pb in Contaminated Soils Using Phosphate Rock and Phosphoric Acid,” Journal of Hazardous Materials, Vol. 164, No. 2-3, 2009, pp. 555-564.
 S. S. Al-Oud and M. I. D. Helal, “Immobilization of Pb in Polluted Soils Using Natural and Synthetic Chemical Additives,” National Groundwater Association (NGWA) Conference on Remediation, New Orleans, 13-14 November 2003.
 D. L. Sparks, “Soil Science Society of America, and American Society of Agronomy, Methods of Soil Analysis. Part 3, Chemical Methods,” Soil Science Society of America Book Series, No. 5, Madison, 1996.
 W. L. Lindsay and W. A. Norwell, “Development of a DTPA Soil Test for Zinc, Iron, Manganese and Copper,” Soil Science Society of America Journal, Vol. 42, No. 3, 1978, pp. 421-428. doi:10.2136/sssaj1978.03615995004200030009x
 L. Yi, Y. Hong, D. Wang and Y. Zhu, “Determination of Free Heavy Metal Ion Concentrations in Soils around a Cadmium Rich Zinc Deposit,” Geochemical Journal, Vol. 41, 2007, pp. 235-240. doi:10.2343/geochemj.41.235
 S. Mbarki, N. Labidi, H. Mahmoudi, N. Jedidi and C. Abdelly, “Contracting Effects of Municipal Compost on Alfalfa Growth in Clay and Sandy Soils: N, P, K Content and Heavy Metal Toxicity,” Bioresource Technology, Vol. 99, No. 15, 2008, pp. 6745-6750.
 P. W. Brown, “Early Hydration of Tetracalcium Aluminoferrite in Gypsum and Lime Gypsum Solutions,” Journal of the American Ceramic Society, Vol. 70, No. 7, 1987, pp. 493-496. http://ciks.cbt.nist.gov/garbocz/cell1994/node18.htm doi:10.1111/j.1151-2916.1987.tb05682.x
 H. Ganjidoust, A. Hassani and A. R. Ashkiki, “Cement-Based Solidification/Stabilization of Heavy Metal Contaminated Soils with the Objective of Achieving High Compressive Strength for the Final Matrix,” Transaction Civil Engineering, Vol. 16, No. 2, 2009, pp. 107-115. http://www.sid.ir/en/VEWSSID/J_pdf?95520092A05.pdf
 J. Komisarek and K. Wiatrowska, “Effectiveness of Oxide-Amendments in the Stabilization Process of Cu, Pb and Zn in Artificially Contaminated Soil,” Polish Journal of Environmental Studies, Vol. 18, No. 6, 2009, pp. 1029-1038. http://www.pjoes.com/pdf/18.6/1029-1038.pdf