1. Axelrod, J., R. J. Wurtman, and S. H. Snyder. 1965. Control of hydroxy indole Omethyltransferase activity in the rat pineal gland by environmental lighting. J. Biol. Chem., 240: 949–954.
2. Braunstein, A. E. 1960. Pyridoxal phosphate. In Boyer, P. D., H. Lardy, and K. Myrbäck, eds., The Enzymes, vol. 2, 113–184, New York, Academic Press.
3. Gantzer, E. 1960. Wirkungnen von Cumarin auf Wachstums- und Entwicklungsvorgänge und seine Wänderungsfahigkeit im Pflanzengewebe. Planta, 55: 235–253.
4. Garner, W. W., and H. A. Allard. 1920. Effect of the relative length of day and night and other factors of the environment on growth and reproduction in plants. J. Agr. Res., 18: 553–606.
5. Hammond, J., Jr. 1954. Light regulation of hormone secretion. In Harris, R. S., G. F. Marrian, and K. V. Thimann, eds., Vitamins and Hormones, vol. 12. 157–206, New York, Academic Press.