1. Boveris, A., Cadenas, E., and Chance, B., Fedn Proc.40 (1981) 195.
2. Quickenden, T. L., and Que Hee, S. S., Specul. Sci. Technol.4 (1981) 453.
3. Kaznachejev, V. P., and Michailova, L. P., Ultraweak radiation from cells as mechanism of intercellular interaction. Nauka Publishing House, Novosibirsk 1981.
4. Lavorel, J., Biochim. biophys. Acta590 (1980) 385.
5. Hamman, J. P., Seliger, H. H., and Posner, G. H., Proc. natl Acad. Sci. USA78 (1981) 940.