1. Hellebust, J.A.: Light: plants. In: Marine ecology. Vol. I. Environmental factors, Pt 1. pp 125?158. Ed. by O. Kinne. London: Wiley-Interscience 1970
2. Jansson, B.-O.: Ecosystem approach to the Baltic problem. Bull. ecol. Res. Comm. Stockholm 16, 1?82 (1972)
3. Johnson, W.S., A. Grigon, S.L. Gulman and H.A. Mooney: Comparative photosynthetic capacities of intertidal algae under exposed and submerged conditions. Ecology 55, 450?453 (1974)
4. Johnston, C.S., N.C. Ferrier and R.G. Jones: A critical assessment of estimates of macroalgal primary production based on short-term measurments of photosynthesis, International Seaweed Symposium No. 8, held at Bangor (Abstracts) (1974)
5. Kanwisher, J.W.: Photosynthesis and respiration in some seaweeds. In: Some contemporary studies in marine science, pp 407?480. Ed. by H. Barnes. London: George Allen & Unwin, Ltd. 1966