14576 Stepahn Teyssen/Manfred Singer: Alkohol. Das unterscha''tzte
Gift. Spektrum 2001/4, 58-67, Spektrum 2001/7, 8.

10045 Ingrid Wickelgren: Marijuana - harder than thought?
Science 27 June 1997, 1967-1968. Contrary to the popular view that
marijuana is a relatively benign drug, new evidence suggests its effects
in the brain resemble those of heroin and cocaine.