LÅGBU, Øivind. Population development and breeding success of Grey Heron Ardea cinerea in South-eastern Norway. Ornis Norvegica, [S. l.], v. 30, p. 116–123, 2007. DOI: 10.15845/on.v30i0.177. Disponível em: https://boap.uib.no/index.php/ornis/article/view/177. Acesso em: 24 apr. 2024.