1. Alexandersson, B., Evans, D., Sj�qvist, F.: Steady-state plasma levels of nortryptiline in twins: Influence of genetic factors and drug therapy. Brit. med. J. 1969 IV, 764?768
2. And�n, N.-E., Butcher, S., Corrodi, H., Fuxe, K., Ungerstedt, U.: Receptor activity and turn-over of dopamine and noradrenaline after neuroleptics. Europ. J. Pharmacol. 11, 303?314 (1970)
3. �sberg, M.: Nortryptiline in the treatment of depression: Relationship between plasma levels and effects. Thesis. Karolinska Institutet, Stockholm 1973
4. Chase, T.: Central monoamine metabolism in man. Effect of putative dopamine receptor agonists and antagonists. Arch. Neurol. (Chic.) 29, 341?351 (1973)
5. DiMascio, A.: In: Butyrophenones in Psychiatry, A. DiMascio and R. I. Shader, eds., pp. 18?19. New York: Raven Press 1972