Harbour porpoises Phocoena phocoena in the eastern Scheldt: a resident stock or trapped by a storm surge barrier? von Jansen, Okka E, Aarts, Geert M, Reijnders, Peter J H

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Plastic ingestion by harbour seals (Phoca vitulina) in The Netherlands von Bravo Rebolledo, Elisa L., Van Franeker, Jan A., Jansen, Okka E., Brasseur, Sophie M.J.M.

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Parameters of growth and reproduction of white-beaked dolphins (Lagenorhynchus albirostris) from the North Sea von Galatius, Anders, Jansen, Okka E., Kinze, Carl C.

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Diet of harbor porpoises along the Dutch coast: A combined stable isotope and stomach contents approach von Jansen, Okka E., Michel, Loïc, Lepoint, Gilles, Das, Krishna, Couperus, Abraham S., Reijnders, Peter J. H.

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Are white-beaked dolphins Lagenorhynchus albirostris food specialists? Their diet in the southern North Sea von Jansen, Okka E., Leopold, Mardik F., Meesters, Erik H.W.G., Smeenk, Chris

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