E. Hartwig

Losses of seabirds by oil pollution at the German North Sea coast

B. Reineking, G. Vauk, E. Hartwig, 1989 .

On the biology and food of small-sized fish from North and Baltic Sea areas. IV. Investigations on an eulittoral mud flat at Sylt Island

C. D. Zander, E. Hartwig, 1982, Helgoländer Meeresuntersuchungen.

A Bibliography of the Interstitial Ciliates (Protozoa): 1926–1979

E. Hartwig, 1980 .

On the systematics and ecology of interstitial ciliates of sandy beaches in North Yorkshire

J. G. Parker, E. Hartwig, 1977, Journal of the Marine Biological Association of the United Kingdom.

Statistical analyses of the results of 25 years of beach litter surveys on the south-eastern North Sea coast.

David J. Fleet, David Fleet, M. Schulz, 2015, Marine environmental research.

Investigations on the ecophysiology of Geleia nigriceps Kahl (Ciliophora, Gymnostomata) inhabiting a sandy beach in Bermuda

W. Wieser, E. Hartwig, 2004, Oecologia.

Plastic debris as nesting material in a Kittiwake-(Rissa tridactyla)-colony at the Jammerbugt, Northwest Denmark.

E. Hartwig, Mathias Heckroth, Thomas Clemens, 2007, Marine pollution bulletin.