1. Beitra¨ge zur Hydrographie und Wa¨rmebilanz der Nordsee;Becker;Deutsche Hydrographische Zeitschrift,1981
2. Long-term variations of temperature and salinity in the inner German Bight;Becker;Rapports et Proces-verbaux de la Reunions du Conseil International pour l'Exploration de la Mer,1978
3. Trends in nutrient and phytoplankton concentrations at Helgoland Reede (German Bight) since 1962;Berg;ICES C.M. 1985/L:2, Copenhagen,1985
4. Distribution of dissolved aluminium in surface waters of the North Sea influence of biological processes;Beusekom,1988
5. Biologische Anstalt Helgoland (1962–1987) Jahresberichte, Hamburg.