1. DiRaddo, J., Kellog, C.: In vivo rates of tyrosine and tryptophan hydroxylation rat brains at four times during the light-dark cycle. Naunyn-Schmiedeberg's Arch. Pharmacol. 286, 389?400 (1975)
2. Haus, E., Halberg, F., Kuhl, J. F. W., Lakatua, D. J.: Chronopharmacology in animals. In Chronobiological Aspects of Endocrinology, J. Aschoff, F. Ceresa, and F. Halberg, eds., pp. 269?304. Stuttgart-New York: F. K. Schattauer Verlag 1974
3. Holloway, F. A.: State-dependent effects of ethanol on active and passive avoidance learning. Psychopharmacologia (Berlin) 25, 238?261 (1972)
4. Kety, S. S.: The biogenic amines in the central nervous system: Their possible roles in arousal emotion and learning. In: The Neurosciences: Second study program, F. O. Schmitt, ed., pp. 324?336. New York: Rockefeller University Press 1970
5. Lew, G. M.: Circadian rhythms in blood pressure and norepinephrine in genetically hypertensive and normotensive rats. Gen. Pharmacol. 7, 35?40 (1976)