SANI, Hannatu A.; TSAFE, A.I.; BAGUDO, B.U.; ITODO, A.U. Toxic Metals Uptake by Spinach (Spinacea oleracea) and Lettuce (Lactuca sativa) Cultivated in Sokoto: A Comparative Study. Pakistan Journal of Nutrition, Pakistan, v. 10, n. 6, p. 572–576, 2011. DOI: 10.3923/pjn.2011.572.576. Disponível em: https://pjnonline.org/pjn/article/view/1453. Acesso em: 15 aug. 2025.