Byrne, C., J. A. N. Parnell, and K. Chayamarit. “Systematics of the Thai Calophyllaceae and Hypericaceae With Comments on the Kielmeyeroidae (Clusiaceae)”. Thai Forest Bulletin (Botany), vol. 46, no. 2, Dec. 2018, pp. 162-16, doi:10.20531/tfb.2018.46.2.08.