GEBREYOHANNES, T. .; GEBREKIDAN, A. . Toxicological assessment of Pb, Cd and Cr in lettuce and onion grown around Ellala River in Mekelle, Tigray, Ethiopia. Ethiopian Journal of Science and Technology, [S. l.], v. 11, n. 3, p. 287–313, 2025. Disponível em: https://journals.bdu.edu.et/index.php/EJST/article/view/2604. Acesso em: 4 feb. 2026.