1. Almagro, L., Gómez Ros, L. V., Belchi-Navarro, S., Bru, R., Ros Barceló, A., & Pedreño, M. A. (2009). Class III peroxidases in plant defence reactions. Journal of Experimental Botany, 60(2), 377–390.
2. Arts, I. C. W., van de Putte, B., & Hollman, P. C. H. (2000). Catechin contents of foods commonly consumed in the Netherlands. 1. Fruits, vegetables, staple foods, and processed foods. Journal of Agricultural and Food Chemistry, 48, 1746–1751.
3. Bank of Thailand (2011). Farm prices in northern regions: RG_NR_038. Bank of Thailand, Bangkok, Thailand. Available at: http://www2.bot.or.th/English/Statistics/RegionalEconFinance/Northern/Pages/RealSector.aspx . Accessed 16 March 2011.
4. Bradford, M. M. (1976). A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding. Analytical Biochemistry, 72, 248–254.
5. CAI & OAE (2009). Forecasting results of major economic agricultural products, crop year 2009/2010. Journal of the Centre for Agricultural Information and Office of Agricultural Economics, Bangkok, Thailand. Available at: http://www2.oea.go.th/mis/Forecast/02_journal/journal-June-2009.pdf . Accessed 16 March 2011.