KHALEEL, Sabah M.J. Studying the Heavy Metals Composition and the Impact of Different Common Solvents on the Extraction Efficiency of Phytochemical Secondary Metabolites from the Leaves of Ziziphus spina-christi Grown in Jordan. Pakistan Journal of Nutrition, Pakistan, v. 17, n. 8, p. 392–398, 2018. DOI: 10.3923/pjn.2018.392.398. Disponível em: https://pjnonline.org/pjn/article/view/2616. Acesso em: 30 aug. 2025.