UAV-Based Spectral and Thermal Indices in Precision Viticulture: A Review of NDVI, NDRE, SAVI, GNDVI, and CWSI. - Vera-Esmeraldas, Adrián; Pizarro-Oteíza, Sebastián; Labbé, Mariela; Rojo, Francisco; Salazar, Fernando (Agronomy, 2025)