DE WILDE, W. J.; DUYFJES, B. E. Revision of Cyclocodon Griff. ex Hook.f. & Thomson (Campanulaceae). Thai Forest Bulletin (Botany), [S. l.], n. 40, p. 20–25, 2014. Disponível em: https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24122. Acesso em: 19 aug. 2022.