Estimation of caffeine in different beverages by Ultraviolet Spectroscopy. International Journal of Pharmacy and Life Sciences, [S. l.], v. 2, n. 11, p. 1214–1215, 2011. Disponível em: https://ijplsjournal.com/index.php/ijpls/article/view/895. Acesso em: 4 feb. 2026.