W. Friedrich

Strategies of passerine migration across the Mediterranean Sea and the Sahara Desert : a radar study

Dieter Schmidl, Herbert Biebach, J. Partecke, 2008 .

The daily pattern of autumn bird migration in the northern Sahara

S. Jenni-Eiermann, L. Jenni, H. Biebach, 2008 .

Interaction of bodymass, fat, foraging and stopover period in trans-Sahara migrating passerine birds

H. Biebach, G. Heine, H. Biebach, 1986, Oecologia.