Calero-Toledo, Lymari M., et al. “Sequential Sampling Plan for Corn Earworm, Helicoverpa Zea (Boddie) (Lepidoptera: Noctuidae), in Corn Fields on the South Coast of Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico, vol. 92, no. 3-4, Oct. 2008, pp. 207-14, doi:10.46429/jaupr.v92i3-4.2637.