Digital mapping of coffee ripeness using UAV-based multispectral imagery - Nogueira Martins, Rodrigo; Pinto, Francisco de Assis de Carvalho; Queiroz, Daniel Marçal de; Valente, Domingos Sárvio Magalhães; Rosas, Jorge Tadeu Fim; Portes, Marcelo Fagundes; Cerqueira, Elder Sânzio Aguiar (Computers and Electronics in Agriculture, 2023)