1. The Medical and Poisonous Plants of Southern and Eastern Africa;Watt,1962
2. The epidemiology of khat chewing in republic of Djibouti;Baasher,1983
3. Tash FM, Farag RM and Bolos M, Effect of khat and its active principle cathinone on glycogen metabolism. Ain-Shams Med J, in press.
4. Tash FM, Farag RM and El-Deep T, Effect of khat and its active principle cathinone on the liver. Ain-Shams Med J, in press.
5. Tash FM and Farag RM, Effect of khat and its active principle cathinone on proteolytic activity in vitro. In Ain Shams Med J, in press.