Putungan, D.B., Santos, A.B. and Natividad, D.K.C. 2009. Quantitative measurement of discolorations on okra (Abelmoschus esculentus) leaves through digital image processing. Proceedings of the Samahang Pisika ng Pilipinas, 27(1), SPP-2009-PA-05. URL: https://proceedings.spp-online.org/article/view/SPP-2009-PA-05.