Eksomtramage, Ladda, Saijai Jornead, Wijitra Kaewnam, and Waahusmao Mama. 2014. “Karyotypic Studies in Four Species of Gynura in Tribe Senecioneae (Asteraceae)”. Thai Forest Bulletin (Botany), no. 38 (November):90-94. https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24385.