GASHAWA, Alemayehu; GETACHEW, Tewodros. The Chemistry of Khat and Adverse Effect of Khat Chewing. American Scientific Research Journal for Engineering, Technology, and Sciences, Jordan, v. 9, n. 1, p. 35–46, 2014. Disponível em: https://asrjetsjournal.org/American_Scientific_Journal/article/view/633. Acesso em: 12 sep. 2025.