1. 21) Scheer, H., Structure and occurrence of chlorophylls. In “Chlorophylls”, eds. Katz, J. J., Bowan, M. K., Michalski, T. J., and Worcester, D. L., CRC Press, Boca Raton, pp. 1–30 (1991).
2. 31) Cogdell, R. J., Light-harvesting complexes in the purple photosynthetic bacteria. In “Photosynthesis III Photosynthetic Membrane and Light Harvesting Systems”, eds. Staehelin, L. A., and Arntzen, C. J., Springer-Verlag, Berlin, Germany, pp. 252–259 (1986).