M. H. Al-Mashreki, J. B. M. Akhir, S. A. Rahim, K. Md. Desa, T. Lihan and A. R. Haider, ”Land Suitability Evaluation For Sorghum Crop in the Ibb Governorate, Republic of Yemen Using Remote Sensing And GIS Techniques,” Australian Journal of Basic and Applied Sciences, Vol. 5, No. 3, 2011, pp. 359-368.
 A. A. Jafarzadeh, P. Alamdari, M. R. Neyshabouri and S. Saedi, “Land Suitability Evaluation of Bilverdy Research Station for Wheat, Barley, Alfalfa, Maize and Safflower,” Soil and Water Research, Vol. 3, 2008, pp. 581-588.
 A. Keshavarzi, F. Sarmadian, A. Heidari and M. Omid, “Land Suitability Evaluation Using Fuzzy Continuous Classification (A Case Study: Ziaran Region),” Modern Applied Science, Vol. 4, No. 7, 2010. pp. 72-81
 M. Albaji, A. A. Naseri, P. Papan and S. B. Nasab, “Qualitative Evaluation of Land Suitability for Principal Crops in The West Shoush Plain, Southwest Iran,” Bulgarian Journal of Agricultural Science, Vol. 15, No. 2, 2009, pp. 135-145.
 M. Elaalem, “Land Suitability Evaluation for Sorghum Based on Boolean and Fuzzy-Multi-Criteria Decision Analysis Methods,” International Journal of Environmental Science and Development, Vol. 3, No. 4, 2012, pp. 357-361.
 D. Djaenuddin, Basuni, S. Hardjowigeno, H. Subagyo, M. Sukardi, I. M. Ds, N. Suharta, L. Hakim, Widagdo, J. Dai, V. Suwandi, S. Bachri and E. R. Jordens, “Kesesuaian Lahan untuk Tanaman Pertanian dan Tanaman Kehutanan (Land Suitability for Agricultural and Silvicultural Plants),” Second Land Resource Evaluation and Planning Project, ADB Loan No. 1099 INO. Centre for Soil and Agroclimate Research, Bogor, 1994.
 Sh. Ashraf, R. Manoukyan and Sh. Ayoubi, “Land Suitability Evaluation in Damghan Plain for Barley, Using Compare and Conformity Methods (Northeast-Iran),” Pakistan Journal of Biological Sciences, Vol. 14, No. 2, 2011, pp.123-127. doi:10.3923/pjbs.2011.123.127
 T.S. Babalola, T. Oso, A.S. Fasina and K. Godonu, “Land Evaluation Studies of Two Wetland Soils in Nigeria,” International Research Journal of Agricultural Science and Soil Science, Vol. 1, No. 6, 2011, pp. 193-204.
 S. Baja, D. M. Chapman and D. Dragovich, “A Conceptual Model for Assessing Agricultural Land Suitability at a Catchment Level Using a Continuous Approach in GIS,” Proceedings of the Geospatial Information and Agriculture Conference, Sydney NSW Agriculture, Sydney, 16-19 July 2001, pp. 828-841.
 S. Baja, D. M. Chapman and D. Dragovich, “A Conceptual Model for Defining and Assessing Land Management Units Using a Fuzzy Modelling Approach in GIS Environment,” Environmental Management, Vol. 29, No. 5, 2002, pp. 647-661. doi:10.1007/s00267-001-0053-8