1) Gottfries, G. C., Gottfries, I., Roos, B. E.: The investigation of homovanillic acid in human brain and its correlation to senile dementia. Br. J. Psychiat., 115: 563-574, 1969
2) Davies, P., Maloney, A. F. J.: Selective loss of central cholinergic neurons in Alzheimer's disease. Lancet, 1: 1403, 1976
3) Bowen, D. M., Smith, C. B., White, P. et al.: Neurotransmitter-related enzymes and indices of hypoxia in senile dememtia and other abiotrophies. Brain, 99: 459-496, 1976
4) Gottfries, G. C., Adolfsson, R., Aquilonius, S. M.: Biochemical changes in dementia disorders of Alzheimer-type (AD/SDAT). Neurobiol. Aging, 4: 261-271, 1983
5) Arai, H., Kosaka, K., Iizuka, R.: Changes of biogenic amines and their metablites in postmortem brains from patients with Alzheimertype dementia. J Neurochem., 43: 388-393, 1984