JULIUS, A.; KAMIN, I.; KIEW, R.; UTTERIDGE, T. M. Gardneria and Spigelia (Loganiaceae), two genera new to the Flora of Peninsular Malaysia. Phytotaxa, Auckland, New Zealand, v. 129, n. 1, p. 39–46, 2013. DOI: 10.11646/phytotaxa.129.1.3. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.129.1.3. Acesso em: 6 dec. 2025.