de Melo Machado, L.E. et al. 2026. Mean cumulative global irradiation at ground level described by sigmoidal models, in Belo Horizonte/MG. Revista Agrogeoambiental. 18, unico (jun. 2026), e20262066. DOI:https://doi.org/10.18406/2316-1817v18nunico20262066.