Blew, J., Günther, K., Hälterlein, B., Kleefstra, R.
, Laursen, K. & Scheiffarth, G. (2016).
Trends of Migratory and Wintering Waterbirds in the Wadden Sea 1987/1988-2013/2014. Wilhelmshaven: Common Wadden Sea Secretariat (CWSS).
Blew, J., Günther, K., Hälterlein, B., Kleefstra, R.
, Laursen, K. & Scheiffarth, G. (2015).
Trends of Migratory and Wintering Waterbirds in the Wadden Sea 1987/1988-2011/2012. Common Wadden Sea Secretariat. Wadden Sea Ecosystem Bind 34
Blew, J., Günther, K., Hälterlein, B., Kleefstra, R.
, Laursen, K. & Scheiffarth, G. (2013).
Trends of Migratory and Wintering waterbirds in the Wadden Sea 1987/1988-2010/2011.
Wadden Sea Ecosystem, (31), 1-53.
Koffijberg, K.
, Laursen, K., Hälterlein, B., Reichert, G., Frikke, J. & Soldat, L. (2015).
Trends of Breeding Birds in the Wadden Sea 1991-2013. I
Wadden Sea Ecosystem (Bind 35, s. 1-50).
Koffijberg, K., Dijksen, L.
, Laursen, K. & Potel, P. (2011).
Trends in numbers and distribution of breeding birds in the Wadden Sea. I H. Marencic, K. Eskildsen, H. Farke & S. Hedtkamp (red.),
Science for Nature Conservation and Management: the Wadden Sea Ecosystem and EU Directives. Proceedings of the 12th International Scientific Wadden Sea Symposium in Wilhelmshaven, Germany, 30 March - 3 April 2009 (s. 47-52). Wilhelmshaven: Common Wadden Sea Secretariat (CWSS).
http://www.waddensea-secretariat.org/news/symposia/Symposium-2009/Proceedings/2-13-Koffijberg-et-al-breeding-birds.pdfMitchell, C., Colhoun, K.
, Fox, A. D., Griffin, L., Hall, C., Hearn, R. & Walsh, A. (2010).
Trends in goose numbers wintering in Britain and Ireland.
Ornis Svecica,
20(3-4), 128-143.
