S. Sukonthabhirom na Pattalung and S. Visetson, “Toxicity of Extract from Thai Neem, Azadiracta indica var. siamensis Valeton to Corn Stemborer, Ostrinia furnacalis (Guenee)”, Thai Agric.Res.J., vol. 21, no. 2, pp. 160–169, Aug. 2003.