HÅGVAR, S.; GLESNE, O.; ØSTBYE, E. Food habits and niche overlap in three alpine passerine birds, South Norway. Ornis Norvegica, [S. l.], v. 32, p. 56–73, 2009. DOI: 10.15845/on.v32i0.159. Disponível em: https://boap.uib.no/index.php/ornis/article/view/159. Acesso em: 29 mar. 2024.