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, v. 29, n. 7, p. 12600 - 12625, 1 Jul. 2020.