Al MotarrebA.BrianconS.Al JaberN.Al-AdhiB.Al-JailaniF.SalekM.S.BroadleyK.K. (2005). Khat chewing is a risk factor for acute myocardial infarction: A case-control study. British Journal of Clinical Pharmacology59: 574–581. doi:10.1111/j.1365–2125.2005.02358.x.
2.
Al MotarrebA.BroadleyK.J. (2003). Coronary and aortic vasoconstriction by cathinone, the active constituent of khat. Autonomic and Autacoid Pharmacology23: 319–326. doi:10.1111/j.1474–8673.2004.00303.x.
3.
AliA.Al-SharabiA.AguirreJ.NahasR. (2004). A study of 342 oral keratotic white lesions induced by qat chewing among 2500 Yemeni. Journal of Oral Pathology and Medicine33: 368–372. doi:10.1111/j.1600–0714.2004.00145.x.
4.
AndersonD.BeckerlegS.HailuD.KleinA. (2007). The Khat Controversy: Stimulating the Debate on Drugs. Berg Publishers, London.
BurtonR. (2004). First Footsteps in East Africa. Kessinger Publishing. First published 1856 Longman, Brown, Green, and Longmans.
8.
CoxG.RampesH. (2003). Adverse effects of khat: A review. Advances in Psychiatric Treatment9: 456–463. doi:10.1192/apt.9.6.456.
9.
CritchlowS.SeifertR. (1987). Khat-induced paranoid psychosis. British Journal of Psychiatry150: 247–249. doi:10.1192/bjp.150.2.247.
10.
Department of Health (England) and the devolved administrations (2007). Drug Misuse and Dependence: UK Guidelines on Clinical management. Retrieved from: www.nta.nhs.uk/uploads/clinical_guidelines_2007.pdf.
El-ShouraS.M.AzizAbdel M.AliM.E.El-SaidM.M.AliK.Z.M.KemeirM.A.ElmalikE.M.A. (1995). Deleterious effects of khat addiction on semen parameters and sperm ultrastructure. Human Reproduction,10: 2295–2300.
14.
ErikssonM.GhaniN.A.KristianssonB. (1991). Khat-chewing during pregnancy-effect upon the offspring and some characteristics of the chewers. East African Medical Journal68: 106–111.
15.
GebissaE. (2004). Leaf of Allah. Ohio State University Press, Ohio.
KalixP. (1990). Pharmacological properties of the stimulant khat. Pharmacology & Therapeutics48 (3): 397–416. doi:10.1016/0163–7258(90)90057–9.
19.
KalixP. (1991). The pharmacology of psychoactive alkaloids from ephedra and Catha. Journal of Ethnopharmacology32 (1–3): 201–208. doi:10.1016/0378–8741(91)90119-X.
20.
KristianssonB.GhanibAbdul N.ErikssonM.GarledM.QirbibA. (1987). Use of khat in lactating women: A pilot study on breast-milk secretion. Journal of Ethnopharmacology21: 85–90. doi:10.1016/0378–8741(87)90097–3.
21.
NasrA.H.KhatriM. (2000). Head and neck squamous cell carcinoma in Hajjah, Yemen. Saudi Medical Journal21 (6): 565–568. Retrieved from: www.smj.org.sa/PDFFiles/Jun00/HeadandNeck.pdf.
22.
NenciniP.AhmedA. (1989). Khat consumption: A pharmacological review. Drug and Alcohol Dependence23: 19–29. doi:10.1016/0376–8716(89)90029-X.
23.
NumanN. (2004). Exploration of adverse psychological symptoms in Yemeni khat users by the Symptoms Checklist-90 (SCL-90). Addiction99: 61–65. doi:10.1111/j.1360–0443.2004.00570.x.
24.
OdenwaldM.NeunerF.SchauerM.ElbertT.CataniC.LigenfelderB.RockstrohB. (2005). Khat use as risk factor for psychotic disorders: A cross-sectional and case-control study in Somalia. BMC Medicine12 (3): 5. doi:10.1186/1741–7015-3–5.
25.
PantelisC.HindlerC.TaylorJ. (1989). Khat toxic reactions to this substance, its similarities to amphetamine, and the implications of treatment for such patients. Journal of Substance Abuse Treatment6: 205–206.
TonnesS.W.HarderS.SchrammM.NiessC.KauertG.F. (2006). Pharmacokinetics of cathinone, cathine and norephedrine after the chewing of khat leaves. British Journal of Clinical Pharmacology56: 125–130. doi:10.1046/j.1365–2125.2003.01834.x.
28.
TonnesS.KauertG. (2004). Driving under the influence of khat — alkaloid concentrations and observations in forensic cases. Forensic Science International140 (1): 85–90.
WidlerP.MathysK.BrenneisenR.KalixP.FischH.U. (1994). Pharmacodynamics and pharmacokinetics of khat: A controlled study. Clinical Pharmacology & Therapeutics55: 556–562.