W. Sasiprapa, S. Ratanariwong, V. Sarawat, S. Somkid, and N. Wannasai, “Using GUMCAS to Identify Site Specific Cassava (Manihot esculenta Crantz) Cultivar and Planting Duration”, Thai Agric.Res.J., vol. 29, no. 2, pp. 147–160, Sep. 2011.