1. Anonymous. Khat. Bulletin on Narcotics, United Nations8: 6–13. 1956.
2. Bally, P.R.O.Catha edulis. East African Medical Journal22: 2–3. 1945.
3. Brooke, Clarke. Khat(Catha edulis): its production and trade in the middle east. Geographical Journal126: 52–59, plates in leaf 1 following p. 52, 1960.
4. Carothers, John Colin Dixon. Miraa as a cause of insanity. East African Medical Journal22: 4–6. 1945.
5. Editorial. Poisoning by khat or miraa,Catha edulis. East African Medical Journal22: 1–2. 1945.