MATTU, V. K.; THAKUR, M. L. Birds of Summer Hill, Shimla (Himachal Pradesh). Indian Forester, [S. l.], v. 132, n. 10, p. 1271–1281, 2006. DOI: 10.36808/if/2006/v132i10/4276. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/4276. Acesso em: 5 dec. 2025.