1. Ahlenius, S., Engel, J.: Effects of small doses of haloperidol on timing behaviour. J. Pharm. Pharmacol.23, 301?302 (1971).
2. Cianchetti, C., Masala, C., Corsini, G. U., Mangoni, A., Gessa, G. L.: Effect of apomorphine on human sleep. Life Sci.23, 403?408 (1978).
3. Clark, D., Engberg, G., Pileblad, E., Svensson, T. H., Carlsson, A., Freeman, A. S., Bunney, B. S.: The effects of novel dopaminergic agonists on the nigrostriatal dopamine system. Clin. Neuropharmacol.7, suppl. 1, S-45 (1984 a).
4. Clark, D., Hjorth, S., Carlsson, A.: (+)- and (?)-3-PPP exhibit different intrinsic activity at striatal dopamine autoreceptors controlling dopamine synthesis. Eur. J. Pharmacol.106, 185?189 (1984 b).
5. Crow, T., Johnstone, E. C., Longden, A., Owen, F.: Dopamine and schizophrenia. Adv. Biochem. Psychopharmacol.9, 301?309 (1978).