Maliwan Boonsaner, Thamnoon Kaewumput, and Arthorn Boonsaner. “Vetiver Grass: a Natural Barrier to Protect Against Organophosphate Pesticides from Cabbage Fields”. Agriculture and Natural Resources, vol. 39, no. 3, Sept. 2005, pp. 350-6, https://li01.tci-thaijo.org/index.php/anres/article/view/243323.