Extraction of Caffeine from Spent Coffee Ground by Solid-liquid Extraction. Baghdad Science Journal, Iraq, Baghdad, v. 21, n. 6, p. 2017, 2024. DOI: 10.21123/bsj.2023.8721. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/8721.. Acesso em: 22 jul. 2024.