1. Baryshev, V.A., Glagolev, A.N. and Skulachev, V.P., 1981, Sensing of in phototaxis of Halobacterium halobium, Nature, 292: 338–340.
2. Benedetti, P.A., and Lenci, F., 1977, In vivo microspectrofluorometry of photoreceptor pigments in Euglena qracilis, Photochem. Photobiol., 26:315–318.
3. Bogomolni, R.A., and Spudich, J.L., 1982, Identification of a third rhodopsin-like pigment in phototactic Halobacterium halobium, Proc. Natl. Acad. Sci. USA, 79: 6250–6254.
4. Colombetti, G., Lenci, F. and Diehn, B., 1982, Responses to photic, chemical and mechanical stimuli, in: “The Biology of Euglena”, vol. 3, D.E. Buetow, ed., Academic, New York, pp. 169–195.
5. Colombetti, G., Lenci, F. and Song, P.-S., eds., 1985, “Sensory perception and transduction in aneural organisms”, Plenum, London.