Chen, Y., X. Qing, J. Liu, J. Zhang, and R. Zhang. “Toxic Effects of Virtako on the Brown Planthopper, Nilaparvata Lugens (Hemiptera: Delphacidae)”. Revista Colombiana De Entomología, vol. 39, no. 2, Dec. 2013, pp. 197-00, doi:10.25100/socolen.v39i2.8234.