Li, Gary, and Peter W. Fritsch. “A Taxonomic Revision of Taxa in Styrax Series Cyrta (Styracaceae) With Valvate Corollas”. Journal of the Botanical Research Institute of Texas 12, no. 2 (November 20, 2018): 579–641. Accessed October 13, 2024. https://journals.brit.org/jbrit/article/view/962.