1. Slater, E., In: Biological Research in Schizophrenia, Academy of Medical Sciences of the U. S.S.R., Institute of Psychiatry, 244–249, 1967.
2. Heath, R.G., Martens, S., Leach, B.E., Cohen, M. and Angel, C., Am. J. Psychiat., 114, 683, 1958.
3. Heath, R.G., Martens, S., Leach, B.E., Cohen, M. and Feigley, C., Am. J. Psychiat., 114, 683, 1958.
4. Bergen, J.R., Pennell, R.B., Saravis, C.A., Freeman, H. and Hoagland, H., In: Biological Treatment of Mental Illness, M. Rinkel (ed.), L.C. Page and Co., New York, 18, 323, 1966.
5. Bergen, J.R., Gray, F.W., Pennell, R.B., Freeman, H. and Hoagland, H., Arch. Gen. Psychiat., 12, 80, 1965.