1. Ali, M. (ed.): Vision in fishes. NATO Advanced Study Institute Series: Life Sciences, Vol. 1., pp. 836. New York: Plenum Publishing Corporation 1975
2. Anderson, D.H., Fisher, S.K.: The photoreceptors of diurnal squirrels: outer segment structure, disc shedding and protein renewal. J. Ultrastruct. Res.55, 119?141 (1976)
3. Anderson, D.H., Fisher, S.K., Steinberg, R.H.: Mammalian cones ? disc shedding, phagocytosis, and renewal. Invest. Ophthalmol.17, 117?133 (1978)
4. Arechiga, H.: Circadian rhythmicity in the nervous system of crustaceans. Fed. Proc.36, 2036?2041 (1977)
5. Axelrod, J.: The pineal gland: a neurochemical transducer. Science184, 1341?1348 (1974)