1. Avery, O.T., MacLeod, CM. & McCarty, M. (1944). Studies on the chemical nature of the substance inducing transformation of pneumococcal types. J. Exp. Med., 79, 137-157.
2. Björn, L.O. (1969a). Action spectra for transformation and fluorescence of protochlorophyll holochrome from bean leaves. Physiol Plant, 22, 1-17.
3. Björn, L.O. (1969b). Studies on the phototransformation and fluorescence of protochlorophyll holochrome in vitro. In Metzner, H. (ed.), Progr. in photosynthesis research, Vol. II, pp. 618-629. Tübingen.
4. Diakoff, S. & Scheibe, J. (1973). Action spectra for chromatic adaptation in Tolypothrix tenuis . Plant Physiol., 51, 382-385.
5. Engelmann, Th. W. (1882a). Ueber Sauerstoffausscheidung von Pflanzenzellen im Mikrospektrum. Bot.Ztg., 40,419-426.