GASHAWA, A.; GETACHEW, T. The Chemistry of Khat and Adverse Effect of Khat Chewing. American Scientific Research Journal for Engineering, Technology, and Sciences, [S. l.], v. 9, n. 1, p. 35–46, 2014. Disponível em: https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/633. Acesso em: 5 may. 2024.