Phonsena, P. (2014) “Spigelia (Loganiaceae), a new generic record for Thailand”,
Thai Forest Bulletin (Botany)
, (34), pp. 176–178. available at: https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24215 (accessed: 3 April 2025).