MARTIN, Daniel E; LOPEZ JR., Juan D; LAN, Yubin. Laboratory evaluation of the GreenSeeker handheld optical sensor to variations in orientation and height above canopy. International Journal of Agricultural and Biological Engineering, [S. l.], v. 5, n. 1, p. 43–47, 2012. DOI: 10.25165/ijabe.v5i1.572. Disponível em: https://ijabe.org/index.php/ijabe/article/view/572. Acesso em: 27 jan. 2026.