1. β-Carbolines, psychoactive compounds in the mammalian body;Airaksinen;Med Biol,1981
2. The simple β-carboline alkaloids;Allen;Phytochemistry,1980
3. Journal of a voyage up the Amazon and Rio Negro by Richard Spruce, San Carlos del Rio Negro, June 27, 1853;Anonymous;Hooker J Bot Kew Garden Misc,1855
4. Metabolism of the hallucinogen N,N-dimethyltryptamine in rat brain homogenates;Barker;Biochem Pharmacol,1980
5. N,N-Dimethyltryptamine: an endogenous hallucinogen;Barker;Int Rev Neurobiol,1981