FrohmanC.E.HarmisonC.R.ArthurR.E.GottliebJ.S., Confirmation of a Unique Plasma in Schizophrenia. Biological Psychiatry, 1971, 3: pp. 113–121.
2.
BerietH.H.BulC.HimwichH.E., Endogenous Metabolic Factor in Schizophrenic Behavior, Science144, 1964, pp. 311–312.
3.
BrownL.C.WhiteJ.B.KennedyJ.K., Urinary Excretion of Tryptophan Metabolites in Schizophrenic Individuals. American J. of Psychiatry117, 1960, pp. 63–65.