1. Khat: from traditional usage to risk of drug addiction;Adam;Med. Trop.,1994
2. Khat chewing among Agaro secondary school students, Agaro, southwestern Ethiopia;Adugna;Ethiop. Med. J.,1994
3. Chemical pharmacology of Catha edulis;Alles;J. Med. Pharm. Chem.,1961
4. The toxicity of Catha edulis (Khat) in mice;Al-Meshal;J. Subst. Abuse,1991
5. The chewing of khat in Somalia;Elmi;J. Ethnopharmacol.,1983