SCHANZER, I. A. Systematic notes on Ophiorrhiza trichocarpon Blume (Rubiaceae) and some related species. Thai Forest Bulletin (Botany), [S. l.], n. 32, p. 132–145, 2014. Disponível em: https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24368. Acesso em: 14 aug. 2022.