• Author: Wikelski, M. E.M. Tarlow C. M. Eising T.G.G. Groothuis E. Gwinner
• Title: Do night-active birds lack daily melatonin rhythms - A case study comparing a diurnal and a nocturnal-foraging gull species
• Year: 2006
• Reference Type: Journal Article
• Journal/Book Title: Journal für Ornithologie
• Volume: 147
• Issue: 107-111
• Date of Publication: Wednesday, 20 December 2006