Oblitas Cruz, Jimy Frank, and Wilson Castro-Silupu. “Computer Vision System for the Optimization of the Color Generated by the Coffee Roasting Process According to Time, Temperature and Mesh Size”. Ingenieria y Universidad 18, no. 2 (November 20, 2014): 355 - 368. Accessed March 8, 2021. https://revistas.javeriana.edu.co/index.php/iyu/article/view/5617.