Andika, I.M.P.C. et al. 2019. Estimation of Blast Disease Attack Intensity on Rice Plant through NDVI (Normalized Difference Vegetation Index) Image Approach. Jurnal BETA (Biosistem dan Teknik Pertanian). 7, 2 (Jun. 2019), 1–10. DOI:https://doi.org/10.24843/JBETA.2019.v07.i24.