Markones N, Garthe S, Dierschke V, Adler S (2008): Small scale temporal variability of seabird distribution patterns in the south-eastern North Sea. In: Wollny-Goerke K, Eskildsen K (eds): Marine mammals and seabirds in front of offshore wind energy. MINOS – Marine warm-blooded animals in North and Baltic Seas. Teubner, Wiesbaden. pp. 115-140.