1. Baas Becking, L. G. M. and E. J. F. Wood: Biological processes in the estuarine environment. I. II. Ecology of the sulphur cycle. Proc. K. ned. Akad. Wet. (Section B) 58, 160?181 (1955).
2. Barnes, H.: Nutrient elements. In: Treatise on marine ecology and paleoecology. I. Ecology, pp 297?343. Ed. by J. W. Hedgepeth. Washington: Geological Society of America 1957.
3. Beers, J. R., D. M. Steven and J. B. Lewis: Primary productivity in the Caribbean Sea off Jamaica and the tropical north Atlantic off Barbados. Bull. mar. Sci. 18, 86?104 (1968).
4. Bremner, J. M.: Isotope-ratio analysis of nitrogen in nitrogen-15 tracer investigations. In: Methods of soil analysis, pp 1256?1286. Ed. by C. A. Black et al. Madison, Wisconsin: American Society of Agronomy 1965.
5. Brooks, R. H., P. L. Brezonik, H. D. Putnam and M. A. Keirn: Nitrogen fixation in an estuarine environment: the Waccasassa on the Florida Gulf Coast. Limnol. Oceanogr. 16, 701?710 (1971).