VARMAR, J. C.; SAHNI, K. C. Rare Orchids of the North Eastern Region and their Conservation. Indian Forester, [S. l.], v. 102, n. 7, p. 424–431, 1976. DOI: 10.36808/if/1976/v102i7/11915. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/11915. Acesso em: 4 dec. 2025.