Østbye, Eivind, Olav Hogstad, Kjartan Østbye, Leif Lien, Erik Framstad, and Torgrim Breiehagen. 2007. “Structure and Dynamics of a High Mountain Wetland Bird Community in Southern Norway: An 18-Year Study of Waders and Gulls”. Ornis Norvegica 30 (January):4-20. https://doi.org/10.15845/on.v30i0.181.