Aerial surveys of grey seals in the Wadden Sea in the season of 2009-2010 View publication (external link)
Wadden Sea Ecosystem 30: Migratory Waterbirds in the Wadden Sea 1987- 2008 View publication (external link)
Wadden Sea Ecosystem 29: The Wadden Sea Quality Status Report Synthesis Report 2010 View publication (external link)
Wadden Sea Ecosystem 29: The Wadden Sea – A Universally Outstanding Tidal Wetland View publication (external link)