OSIEJUK, Tomasz S.; RATYŃSKA, Katarzyna; DALE, Svein; STEIFETTEN, Øyvind; CYGAN, Jakub P. Ortolan Buntings Emberiza hortulana mimicking other species and other dialects of own species. Ornis Norvegica, [S. l.], v. 27, p. 73–79, 2004. DOI: 10.15845/on.v27i0.199. Disponível em: https://boap.uib.no/index.php/ornis/article/view/199. Acesso em: 3 jul. 2024.