1. Bishop, N. I., Frick, M. & Jones, L. W. In “Biological Solar Energy Conversion” (A. Mitsui, Sh. Miyachi, A. San Pietro, and S. Tamura, eds.) Academic Press, New York 1977, p. 3.
2. Kondratieva, E. N. & Gogotov, I. N. Izvestija Akad. Nauk SSSR Biology Ser. 1: 69, 1976.
3. Kessler, E. In “Algal Physiological Biochemistry” (W. S. P. Steward, ed.) Blackwell, Oxford, 1974, p. 456.
4. Hungante, R. E. Auch. Microbiol. 59: 158, 1967.
5. Efimcev, E. I., Bojchenko, V. A. & Litvin, E. F. Vokladl Akad, Nauk SSR 220: 986, 1975.