Here are a few good links I found about articles dealing with DMT.
Profiles of Psychedelic Drugs: DMT, by Alexander T. Shulgin, PhD
Journal of Psychedelic Drugs, Vol 8 (No. 2) Apr-Jun 1976, 167-168
Programmed Communication During Experiences With DMT, by Timothy Leary
Psychedelic Review, No 8, 1966
The Psychedelic Model of Schizophrenia: The Case of N,N-Dimethyltryptamine, by Gillin, Kaplan, Stillman & Wyatt
American Journal of Psychiatry, Vol 133 (No. 2) Feb 1976, 203-208
Franzen F, Gross H. Tryptamine, N,N-dimethyltryptamine,
N,N-dimethyl-5-hydroxytryptamine and 5-methoxytryptamine in human blood and urine.
Jacob M, Presti D. Endogenous psychoactive tryptamines reconsidered: an anxiolytic role for dimethyltryptamine.
Medical Hypothesis (2005) 64, 930-937.