Fox, A. D., Bell, M. C., Brown, R. A., Mackie, P.
& Madsen, J. (1994).
An Analysis of the Abundance and Distribution of Brent Geese and Wigeon at Strangford Lough, 1965/6-1988/9.
Irish Birds,
5(2), 139-150.
Noer, H., Fox, A. D., Madsen, J., Christensen, T. K., Clausen, P., Ettrup, H.
, Kahlert, J. & Petersen, B. M. (1994).
Base-line Investigations of Waterfowl in Øresund 1993-1994: Results and Conclusions.
Salvig, J. C.
, Laursen, K., Frikke, J., Frederiksen, M. (Ed.) & Dahl, K. (Ed.) (1994).
Bird Life in the Danish Wadden Sea.
Ophelia,
6, 327-332.
Odderskær, P., Kristensen, P. (Ed.) & Hansen, H. O. (Ed.) (1994).
Birds: Osprey. In
EEA Environmental Monographs (pp. 98-99). European Environment Agency.