1. Andreasen S, Allebeck P, Engstrom A, Rydberg U (1987) Cannabis and schizophrenia. A longitudinal study oft Swedish conscripts. Lancet ii: 1483–1486
2. Bell DS (1965) Comparison of amphetamine psychosis and schizophrenia. Br J Psychiatry 111:701–707
3. Benkert O, Hippius H (1996) Psychiatrische Pharmakotherapie. Springer, Berlin Heidelberg New York Tokyo
4. Bettinger J (1980) Cocain intoxikation, massive oral overdose. Ann Emerg Med 10: 429–433
5. Davison K (1987) Organic and toxic concomitants oft schizophrenia: association or chance? In: Helmchen FA, Henn F (eds) Biological perspectives of schizophrenia. Wiley, New York, pp 139–161