1. M.A. Slifkin, Charge Transfer Interaction in Biomolecules, Academic Press, London, 1971.
2. A. Szent-Györgyi, Bioelectronics, Academic Press, New York, 1968.
3. J. Jortner, B. Pullman (Eds.), Perspectives in photosynthesis, Kluwer Academic Publishers, Dordrecht, 1990.
4. Photovoltaic Properties of Porphyrin Thin Films Mixed witho-Chloranil
5. M. Tanaka, F. Urano, M. Nakahata, M. Nagoya, Wako Pure Chemical Industries Ltd., Jpn. Kokai Tokkyo Koho JP 63,233,974 [88,233,974] (Cl. C07D213/20), 29 September 1988; JP Appl. 86/239,763, 8 October 1986, 23 pp.; Chem. Abstr. 111 (1989) 7229a.