O. Y. PEREZ, A. RODRIGUEZ, and A. M. COTES, “A rapid and reliable method for the evaluation of Bacillus thuringiensis native strains against Tecia solanivora (Povolny) (Lepidoptera : Gelechiidae)”, Rev. Colomb. Entomol., vol. 23, no. 2, pp. 113–118, Jun. 1997.