Jee-rajunya, K., and P. Tepgidagarn. “Damages Evaluation of Bt. Transgenic Cotton to Cotton Bollworm, Helicoverpa armigera (Hubner)”. Thai Agricultural Research Journal, vol. 17, no. 1, Mar. 1999, pp. 57-65, doi:10.14456/thaidoa-agres.1999.7.