HOGSTAD, O.; THINGSTAD, P. G.; MARC, D. Gloger’s ecogeographical rule and colour variation among Willow Tits Parus montanus. Ornis Norvegica, [S. l.], v. 32, p. 49–55, 2009. DOI: 10.15845/on.v32i0.156. Disponível em: https://boap.uib.no/index.php/ornis/article/view/156. Acesso em: 20 apr. 2024.