1. Designer drugs 2015: assessment and management;Weaver;Addict Sci Clin Pract,2015
2. New psychoactive substance sin Europe: European Monitoring Centre for Drugs and Drug Abuse. March 2015 report.
3. The khat controversy: stimulating the debate on drug;Anderson,2006
4. Khat use: history and heart failure;El-Menyar;Oman Med J,2015
5. Khat chewing a cause of psychosis;Yousef;Br J Hosp Med,1995