Aerial surveys of grey seals in the Wadden Sea in the seasons of 2007-2008 and 2008-2009 View PDF (external link)
Wadden Sea Ecosystem 27: Exploring Contrasting Trends of Migratory Waterbirds in the Wadden Sea Download
Ergänzende Informationen 2009: Anmeldung des deutsch-niederländischen Wattenmeeres als Weltnaturerbestätte Download
2009 Supplementary Information: Nomination of the Dutch-German Wadden Sea as World Heritage Site Download