Ronnie Concepcion, Elmer Dadios , Argel Bandala, Edwin Sybingco. “Prediction of Cultivation Period and Canopy Area in Lettuce Using Multi-Temporal Visible RGB-Based Vegetation Indices and Computational Intelligence”. International Journal of Advanced Science and Technology 29, no. 7 (July 1, 2020): 12600 - 12625. Accessed April 28, 2024. http://sersc.org/journals/index.php/IJAST/article/view/27956.