RAHAYU, Sri; RODDA, Michele. Hoya of Sumatra, an updated checklist, three new species, and a new subspecies. European Journal of Taxonomy, [S. l.], n. 508, 2019. DOI: 10.5852/ejt.2019.508. Disponível em: https://ejt.sandbox.publicknowledgeproject.org/index.php/ejt/article/view/661. Acesso em: 25 apr. 2026.